OzVMX Forum
Marque Remarks => Yamaha => Topic started by: Tahitian_Red on April 29, 2012, 01:38:10 pm
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Well all the DT-1 talk finally wore me down and caused me to pick up a DT-1MX today. It's a project for sure, but I love a challenge. ;D
Pics and a thousand questions coming soon. LOL
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Hallelujah......You wait Jay, these old things are bloody addictive. ;D
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Another convert, time to hide the stash lol
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It is a 1970 DT-1C MX (red tank) and it has Webco foot-pegs. No tank, seat, rear fender, coil or carb and it looks like someone used it for rear brake parts (pedal, return, rod and arm).
Any tips on the forks? It looks like they might have the Webco fork kit installed (more travel and rubber gators that match a 1971 ad).
The class I plan to race it in has "Stock" in the name, so the Webco frame kit is out. (would have been nice to make a Webco bike out of it) :(
What non-reed upgrade were there for the intake system?
What lightweight items were available back in the day?
I saw an ad for a plastic air-box that mounted in place of the oil tank. Anyone ever see or use one of these?
Can it compete with square-barrel Maicos and side-pipe CZ's?
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Here are some pics. I've got a lot of work ahead of me. ;)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN1976.jpg)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN1979.jpg)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN1983.jpg)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN1999.jpg)
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I can run up to a 34mm Mikuni and install an aftermarket era pipe (Bassani, Hooker, Torque Eng., etc.), but I must keep the stock forks, triples and hubs. It basically needs to look like I purchased it from the dealership, on a Friday and went and raced it on Sunday. That makes it a cool class, but the Euro-bikes have a big advantage.
:(
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Even the spocket cover is not smashed!!
cheers pancho
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Any tips on the forks? It looks like they might have the Webco fork kit installed (more travel and rubber gators that match a 1971 ad).
The Yamaha forks are pretty ordinary and I'd replace 'em with 35mm Betors but if your rules prevent that fit a set of YSS PD valves or Race Tech Gold Valve cartridge emulators. I've got a set of MX250 forks (almost the same as DT1B alloy leg items)with Gold Valves and they work a treat. The Webco fork improver kits don't do much. I've been there with that stuff.
The class I plan to race it in has "Stock" in the name, so the Webco frame kit is out. (would have been nice to make a Webco bike out of it) Sad
Sad indeed :'(. Lowering the engine cradle 2" and lengthening the swingarm 1.5"-2" makes a shitload of difference. Seeing that you can't cut the frame you'll have to compensate by making sure you have the best forks and shocks your rules allow.
What non-reed upgrade were there for the intake system?
If you're restricted to a flange mount carb, use a 32mm from an RT1 but if you're allowed to use a VM style Mikuni go for a 34mm mounted on a rubber spigot. The Yamaha is a great, solid engine but they need some serious port work to be really competitive with the Euros. Ditto the head, the GYT centre plug head is pretty good but a Webco or a Jones head (unobtainium!) work much better. The Jones head looks identical to the stock GYT so that will get you around any rules preventing aftermarket heads. The stock GYT pipe is basically shit...go for a Bassani, Torque Industries or Hooker period pipe for noticably improved performance. Throw the points ignition in the shit can and find a 1975 and on DT400 CDI ignition, the external flywheel is reasonably close to the stocker in weight.
What lightweight items were available back in the day?
There's a guy on Marks Swapmeet selling original shape Preston Petty front fenders right now. Try and get one as they were available in the day and almost every race DT1 used 'em. There are a bunch of plastic tanks available, most guys used a BSA B50 style on their DT1s. Remove the oil tank, find a fibreglass DT2MX airbox, slip in a DT2MX/MX250 rear wheel without the cush drive (a bit lighter+alloy rim), use an alloy rim on front with the stock hub if the rules say you have to but if you can use a period Rickman or REH hub as they were the lightest and best stoppers of the era.
I saw an ad for a plastic air-box that mounted in place of the oil tank. Anyone ever see or use one of these?
See DT2MX quote in previous paragraph. I know the plastic airboxes you speak of....unobtainium again.
Can it compete with square-barrel Maicos and side-pipe CZ's?
This is a tough one...how good a rider are you? Engine wise the Yamaha is potentially as good as the Maico, CZ, Bultaco or anything else you can throw at it. It's just that these bikes were built for "dual sport" action and were waaay under developed. When you consider that the YZ250A is based on the very same engine will give you a hint of the engine's potential. My DT1 from Hell is ported, has a 34mm Amal MK2 Concentric carb and DT400 CDI ignition and a close ratio DT2MX trans and during its brief period of notoriety was easily as competitive as the rival side pipe CZ and Maico squaries.
What lets the DT1 down is the weight and poor chassis dynamics. In a word it's a pig to ride in stock trim.
'tis a pity you can't do the frame mods that are allowed by our rules. They really do transform the bike. The follow up DT2MX had the same geometry as the modified (or Webco) frame mods. It was still a pig but it was a tamer pig ;D.
Our rules appear to be more lenient..allowing for period modifications such as the frame/swingarm mods and many other pre 1970 mods. Being stuck with the stock frame and forks is the big set back but I reckon the challenge in getting the bike to perform competitively is the beauty of the project. That's the reason I built my DT1 back in the early 90's. I had two class legal square barrel Maicos that were far more user friendly but I loved the challenge of turning a frog into a princess. I hope you do too. ;D
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Good info Firko!
I want to keep the stock tank and seat look. Any chance there might be a fiberglass repro out there somewhere? I know someone that can make a seat base for me. I planned to use Petty era fenders front and rear. I'm stuck with the stock hubs, triples and forks, but I should be able to use a VM Mikuni (does someone make an adapter?) and the DT ignition. I will definitely go with a better and lighter aftermarket pipe.
;D
I was thinking emulators using the Webco damper rods and I have a set of Ohlins laying around. The front and rear rims will be replaced.
Looks like my biggest problems will be weight, center of gravity and fork flex. :(
Is the fork brace worth the weight gain?
How do you tell a Jones head from a GYT or DT-1MX?
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another alternative for the forks is to use the inside bits from the later monoshock 250/400 DT's,
bigger damper rods and better springs ;)
they bolt straight in with travel about the same.
i'm using an AT1 front hub on my RT1.
much lighter, still brakes well but needs a bit of a mod to the bearings to fit as the smaller AT used a 12mm axle instead of a 15mm.
i had my fr hub sleaved to take the std 15mm id bearing.
and for the feul tank, i have an AT1 tank that i reckon with a bit of fiddling can be made to fit onto the bigger DT1.
smaller, slimmer and still with similar origional looks
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That bike you've started with looks pretty good Jay....I've started with waaaaay worse examples.
I want to keep the stock tank and seat look. Any chance there might be a fiberglass repro out there somewhere? I know someone that can make a seat base for me. I planned to use Petty era fenders front and rear. I'm stuck with the stock hubs, triples and forks, but I should be able to use a VM Mikuni (does someone make an adapter?) and the DT ignition. I will definitely go with a better and lighter aftermarket pipe.
Don Jones made a lot of bits for the DT1 including an almost replica 'glass tank that is the same shape but a lot narrower. Like all Jones stuff, you'll have a tough time finding one and if you do it'll be a lot of money. The stock tank is heavy but a DT1 doesn't look right without one. Genuine or exact replica tank badges will set you back well over 100 clams but there's a guy on eBay doing passable badges for $60 or so. You'll have an easier time getting a date with Pamela Anderson than finding a rust free and straight DT1 seat base. If your guy is making you one from fibreglass I'll take one too! I'm planning on making a mould from my one goodish seat base but it's way down the priority list at present. I'll keep you in the loop for when mould moves up the list. The rubber inlet manifolds can be bought on eBay. I use one from a TM400 Suzuki.
I was thinking emulators using the Webco damper rods and I have a set of Ohlins laying around. The front and rear rims will be replaced.]I was thinking emulators using the Webco damper rods and I have a set of Ohlins laying around. The front and rear rims will be replaced.
When you use emulators the dampers become irrelevent, merely used to keep the emulator valve in place,
I don't think it'd make much difference whether you use the Webco dampers or the stockers. I'd be using Akront, Borrani or DID 'mud catcher rims to capture the era, even if later un valances rims are cheaper, stronger and easier to clean. To quote the Klub Kevlar Kredo...."It's all about style".
Looks like my biggest problems will be weight, center of gravity and fork flex. Sad
Is the fork brace worth the weight gain?
I'm using those Webco style alloy fork braces on a couple of my bikes purely because I think they look cool. The Spaghetti soft DT1 forks can do with everything you can throw at 'em so I'm certain they'll do some good.
How do you tell a Jones head from a GYT or DT-1MX?
The Jones head has an egg shaped combustion chamber and 'Jones' or 'Kennedy', who took over making them after Jones, imprinted in the casting.
(http://i333.photobucket.com/albums/m392/cherie_jones/514666107_tp.jpg)
(http://i333.photobucket.com/albums/m392/cherie_jones/514665975_tp.jpg)
This thread has some interesting stuff.
http://ozvmx.com/community/index.php?topic=22230.0 (http://ozvmx.com/community/index.php?topic=22230.0)
Below:This DT1 is a pretty well set up bike that appears to operate under your rules
(http://i333.photobucket.com/albums/m392/cherie_jones/DT1TRICK.jpg)
(http://i333.photobucket.com/albums/m392/cherie_jones/DT1TRICK2.jpg)
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That is a cool looking DT-1, but like most DT-1 racers I've come across it has later forks. The black color makes them stealthy in the photos, but it wouldn't get past our scrutineering. Put the stock forks and seat on it, paint the tank red, paint the pipe black and that's what I would like mine to look like when I'm finished.
;D
I thought the Webco rods might be stronger and I already have them. ???
Will the AT-1/CT-1 fork braces work?
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Will the AT-1/CT-1 fork braces work?
No Jay....they're narrower between the legs
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(http://i333.photobucket.com/albums/m392/cherie_jones/orangeDT1MX.jpg)
(http://i333.photobucket.com/albums/m392/cherie_jones/YamahaDT1MX71.jpg)
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No Jay....they're narrower between the legs
not necessarily what you're after
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mainline,
I was thinking the same thing. :D
Firko,
I found those photos in my web searching and the newer forks are on both of them. Our rules are slanted too much towards the Euros and not the era (Kawis, Suzis and Yamahas were modified).
:(
Was the1970 DT-1MX bore chrome or steel?
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I was thinking the same thing. Cheesy
Thank fu*k someone got it ;D.
I found those photos in my web searching and the newer forks are on both of them. Our rules are slanted too much towards the Euros and not the era (Kawis, Suzis and Yamahas were modified).
Sad
I think both of those bikes have stock forks Jay....Your bike is a appears to be 1969 DT1B which came with the candy tangerine tank, square swingarm and steel fork legs. Why can't you fit forks from the next model, the 1970 C? The only major differences are the colour (Candy Apple red), round swingarm and alloy forks. Everything else is pretty much the same. I have steel legs in my DT1 resto but I've got later internals which bolted straight in as Vandy said. Surely your rules aren't that strict? ???
Was the1970 DT-1MX bore chrome or steel?
Here's one of the great DT1 anomalies. From what I'be managed to find out, the DT1MX's that came already set up from the factory, had a chrome bore cylinder. However, if you bought a GYT kit from your Yamaha dealer, the cylinder had matching porting but had a cast iron barrel. Not a lot of genuine DTMX barrels survive today because back in the day when a chrome bore was damaged the technology to rechrome it was in its infancy making businesses that were capable of doing it hard to find and expensive. The cheaper alternative was to go to the dealer and buy a GYT cylinder (or port a stock enduro barrel to GYT specs). That's why you almost never see chrome bore DT1 cylinders but there are plenty of stock bore GYT pistons available on eBay because there aren't any chrome barrels for them. You'll be a very lucky fella if yours still has the chrome bore ;D
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Firko !!!
I think the DT1MX's in the states had the cast iron cylinder as I have an original bike and it is cast iron
It was the GYT kit cylinders that were chrome over here.
They also had RT1 GYT chrome cylinders but were quite rare.
Chrome bore rings are still out there.You can tell them as they have 70 as the 9 & 10th part number.
214-11601-70-00,364-11601-70-00,363-11601-70-00
Bill Davis Texas Vintage Racing Club
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Thanks Bill,
I was getting confused looking at pistons on eBay! I'll pull the cylinder this weekend to be sure before buying anything
Bill are you a Bultaco guy?
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Hey Tahitian !!!
I rode one for about 6 months in 1974.Loved the way it ran & handled but I couldn't stop it as it had no brakes.
I'm a Yamaha guy.
Take care.
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Bills correct.....I got it arse about :-[. I was thinking of what an old Yamaha dealer told me back in the day but I remember him to be pretty brain fuddled too ::). I wasn't sure but when you think of it the chrome bored MX version makes more sense. I've never seen a chrome bore DT1 barrel but I've seen a few cast iron GYT barrels yet very few DT1MX's were sold here. Plenty of kits were however. Looking closely at the kit below however, it would appear that the cylinder is a chrome bore version...I can't see the liner outline on the top.
(http://i333.photobucket.com/albums/m392/cherie_jones/GYTKIT2.jpg)
I should've checked with Bill first, he's a pretty smart Yamaha fella!
They also had RT1 GYT chrome cylinders but were quite rare.
I've got a cast iron GYT RT1 cylinder and remember that my RT1MX had a chrome bore back in the day...go figure ??? Maybe that helped confuse me! Here's my DT1B
(http://i333.photobucket.com/albums/m392/cherie_jones/dt1fhfirk2.jpg)
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Mark both my 68 and 69 have alloy sliders when I got them ?
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Mark both my 68 and 69 have alloy sliders when I got them
If you look at the early ads and magazine pieces you'll find that both the original white '68 DT1 and orange '69 DT1B both had steel sliders Iain. My all original '68 had steel sliders so I'd suspect that maybe they'd been replaced over time. Here's my DT1 with steel sliders (TOP) and a bike '69 model in the USA..also with steel sliders.(bottom) Yeah, I know I've got the front mudguard mounting bracket on upside down ;D.
(http://i333.photobucket.com/albums/m392/cherie_jones/dt1a.jpg)
(http://i333.photobucket.com/albums/m392/cherie_jones/dt169.jpg)
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Will the DT-1 and RT-1 GYT pipes interchange? I see pipes on eBay all the time and the heading says "DT-1,RT-1 pipe". The reason I ask is because I have found and aftermarket pipe labeled RT-1.
???
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Yep, they're the same pipe Jay. There may be a difference but I'm fu*ked if I can see it. I haven't checked but I'm fairly confident they're the same part #.
Jay, check out the latest on the American Eagle/Sprite/Alron thread, we've uncovered another anomoly with the single and twin plug GYT heads. I've never seen a single plug GYT head before...Maybe Bill Davis can help with some info ;).
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Thanks Firko! I found a Bassani pipe for an RT-1 and I wanted to know if it might work. Hopefully Bassani didn't make any changes between his DT-1 and RT-1 pipes.
I've been following the Eagle/Sprite/Alron thread. ;D
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In the Yamaha tuning book covering the dt1s and rt1s the pipes are identical . It also gives the porting and carb mods its worth getting it IF you can find it .
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I found this on http://articles.superhunky.com/4/99
1971 DT1MX
LAST OF THE BREED
By Matt Cuddy
(http://i333.photobucket.com/albums/m392/cherie_jones/DT11.jpg)
1971 DT1MX Yamaha
The 1971 DT1MX Yamaha was the last of a breed that started in 1967-68, with the first Yamaha DT1 250 Enduro. Never remembered for good handling qualities, the DT1 did have reliability and strength that made it a natural for dirt biking.
This fact was not lost on the go-fast crowd, and soon the DT1 was the object of desire for many a dirt rider in the early nineteen seventies, since all of us were inveterate tinkerers and modifiers, because that’s how it was if you wanted to go fast. And we were getting sick of our BSAs and Bultacos blowing up underneath us. Enter the Yamaha DT1.
This was the last of the GYT kitted enduro MX line that started in 1968. When you purchased a Yamaha MX what you got was a stripped enduro with a GYT kit (GYT stood for Genuine Yamaha Tuning). The GYT kit comprised of a different cylinder, head, piston, carburetor and expansion chamber. The rest of the machine was an enduro, devoid of lighting equipment, and sported big white square number plates on the forks, and the flanks of the bike.
The machine was over-built, with crankshaft bearings twice the size of other 250s, and a seemingly indestructible transmission/clutch assembly that took serious abuse and came back for more.
The 1971 was also the year Yamaha started getting serious about producing a real off-road motorcycle, with different spring rates in the forks, and a 21” front wheel. This bike also had some pretty radical porting in its piston-port motor; with a one ring piston and 32mm flange Mikuni carburetor (stock on the enduro was a 28 mm). Also, you could see that the GYT kit was somewhat hand fitted, with ports hand shaped, polished and matched. Neat stuff when you think of the reputation Japanese products had back after WWII.
This was the bike that caught the attention of anyone who raced or rode a dirt bike. For $895.00 out the door, you got a fast, reliable and with minor modifications, a decent handling motorcycle that didn’t blow up every other race, and set a new standard for dirt bikes in general. The motorcycle factories in old Europe scoffed at the DT1, until they closed their doors a few short years later that is.
My 1971 DT1MX was modified with a stretched and lowered frame, Curnutt rear shocks, a No1 Products fork kit with top out springs removed, and spacers installed. A 36mm Mikuni carb, with porting and pipe done by EC Burt of Precision Cycles in Lawndale California, a Filtron Air cleaner and Preston Petty fenders completed the package. For less than $1000.00 I had a bike that could run with the Maicos and Huskys of the day, without the ridiculous maintenance rituals the Euro bikes required. The modifications made it a fast, forgiving motorcycle that was reliable too, something unheard of back then.
In 1972 Yamaha designed a completely new motocross machine that shared none of the parts from the Enduro line. The ’72 DT2MX is one of the most sought after vintage dirt bikes on the market, as it was the breakthrough year for Yamaha, abandoning the Enduro design for a real race machine.
(http://i333.photobucket.com/albums/m392/cherie_jones/dt2mx.jpg)
But for my money the ’71 was the best, and embodied what dirt biking was all about back then. When you had to modify your dirt motorcycle to be competitive, and loved every minute doing it.
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Thanks Firko,
I've read that article before and it is one of the things that inspired me to get a DT-1MX. They were just a little before my time, as I got the "itch" in 1973, reading about "Flying Mike" Brown, in the Mini-Cycle magazines, at our elementary school library.
The historical significance of the DT-1 and especially the DT-1MX are not lost on me. The builder/racer in me wants to "Hot Rod" my bike, but I kind of like the idea of leaving it mostly stock, even if that leaves me at a disadvantage. I always love to root for the underdog.
:D
The RT-1 pipe is just a slight miss fit. I will post pics later. I guess I could have someone adjust it, but maybe I should sell it as is to someone else (Need to find out exactly what it fits first). And it looks like I have a regular DT-1 cylinder and not the GYT cylinder that should be on it, but everything else is DT-1MX.
;D
Could the GYT cylinder have a slightly different exhaust port angle? Looking at the online Yamaha parts catalogs, every RT-1 pipe (stock or GYT) fits DT-1's 1968-71. It doesn't cross through the frame, so I don't think it is for a DT-2 or later. Maybe a later 360 enduro???
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Here is a pic of the GYT pipe and the Bassani:
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/RT-1pipe.jpg)
The Bassani pipe is laying flat on the ground while the first quarter of the GYT is curving upward.
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Coles motors got the bike off miliage Brothers south melbourne for him, geoff Taylor raced the bike in that year. Looking for another one.
not sure about the Sprite frame, may move it on.
Dave, Dave, Dave ;D...I sold you a perfectly good barn find DT2MX that you owned for 15 minutes before moving it on. Of course, that's your perogative mate but why not try keeping a bike to experience the satisfaction of going right through the restoration - race process, you might find that you actually enjoy ownership more than salesmanship. Having said that, I'll take that Sprite roller if you're tired of it and if the price is right. ;)
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I don't know what's happening with your pipes Jay....the RT1 enduro, MX and GYT all have the same exhaust port angle and positioning as their DT1 equivalents. In other words if it fits a DT1, it fits an RT1. Maybe your pipe's been bent somehow or perhaps it was a factory mistake and the reason it's lasted as a NOS pipe for this long ;D ::).
I've got both of the pipes you've shown as well as a Torque Industries and a locally made one and they all fit both DT1 and RT1 engines in my Hindall.
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I know you can't use the frame mods Jay but here's a shot of a Webco kit anyway.. ;D
(http://i333.photobucket.com/albums/m392/cherie_jones/framekit.jpg)
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It's almost like I could cut the head pipe and rotate it just a bit, re-weld and it would fit.
I may just sell the Bassani to buy an RT-1 I saw recently. Maybe the "T" in DT/RT stands for Tribble. ::)
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No and no. The stud pitch is different and the bore and strokes totally different.
RT1= 80mm X 70mm
DT1=70mm X 64mm
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Hi guys , that Bassani pipe is for an RT2MX or DT2MX . If someone else has already stated this then l missed it ,, sorry ,,, ;D
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Thanks Hodaka!
I'll list it that way, if I put it up on eBay. ;D
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Well I pulled the trigger on this Beauty today. It will be in the garage by the weekend.
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/RT1rf.jpg)
Plain old RT-1 with 72 tank. No GYT stuff, yet. ;D
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That's two already....the disease is taking hold ;D. That's a clean looking RT1 though Jay. I'd like to see an original black tank on it...but that's me. ;D
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Well I pulled the trigger on this Beauty today. It will be in the garage by the weekend.
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/RT1rf.jpg)
Plain old RT-1 with 72 tank. No GYT stuff, yet. ;D
Very nice looking bike. makes mine look a bit rugged
pancho.
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That's two already....the disease is taking hold ;D. That's a clean looking RT1 though Jay. I'd like to see an original black tank on it...but that's me. ;D
I think a black 70-71 RT-1 tank or at the very least take off the red-stripe. Probably take the black paint off the fork legs also. I have a set of the Chrome-Gator forks I think might look cool.
;D
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http://www.ebay.com/itm/69-YAMAHA-DT1-250-GYT-DT1MX-MX-DG-EXHAUST-MUFFLER-PIPE-/110673809875?hash=item19c4ac51d3&item=110673809875&pt=Motors_ATV_Parts_Accessories&vxp=mtr (http://www.ebay.com/itm/69-YAMAHA-DT1-250-GYT-DT1MX-MX-DG-EXHAUST-MUFFLER-PIPE-/110673809875?hash=item19c4ac51d3&item=110673809875&pt=Motors_ATV_Parts_Accessories&vxp=mtr)
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Here are few pics of the old girl after she arrived. these are things the previous owner fabricated. The arm extension is very nice!
;D
Swingarm extension
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/SwingarmRS.jpg)
Side panel
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/SidePanel.jpg)
Early KX fender and plate mounts
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/RearFender.jpg)
Hooker pipe guard
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/PipeSide.jpg)
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I've already found a DT-1/RT-1 tank for it. I hate to add any weight, especially up top, but I think it will fit the class better with the correct era tank. I'm just going to paint it black and add the red badges (no pinstripe).
I have a set of stock aluminum slider forks with a Circle Industries fork brace, that came free with the bike, that may go on as well. I also got a great price on a Bassani pipe. It is nice but needs a slight resto to be as nice as the rest of the bike.
Rear shocks, forks springs and emulators all setup for my weight and lack of ability and she is ready to go!!!
;D ;D ;D
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That's a clean and well thought out RT1 Jay. I like the 'chevron' style swingarm extention..very well done.
What's the score with the motor, is it a stocker or is it RT1MX/GYT? I don't think the early tank will weigh much, if anything, more than the current RT2MX item, and the bike'll look so much more period.
What's happening to the DT1?
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Firko,
It's just a Plain Jane RT-1 with Mikuni carb and Hooker pipe. I believe the ports have been cleaned up and polished a bit on the exhaust side. I'm concentrating on the suspension and handling. I'll worry about the power after I get that stuff sorted out. I bought the bike for way less than it would have cost me to fix up the DT-1, even on the cheap. Plus I didn't have to do any labor or running around.
;D
The DT-1CM is a historically significant model and I'll restore it correctly when my racing days begin to wind down. I have already found a bunch of NOS stuff to stash away until then.
;)
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Anyone know the weight savings of switching to the 74 MX rear hub?
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Anyone know the weight savings of switching to the 74 MX rear hub?
at a guess Red it'd be about 1 ounce,
the MX rear hub is also a heavy sucker with sprocket choice being somewhat limited.
my RT1 still uses the stock cush drive item and it's hassle free & sprockets are common.
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Here is the tank I picked up. It will be painted black and I'll add the red Yamaha badges. ;D
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN2127.jpg)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN2128.jpg)
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What a shame, having to paint that tank Red. It's way too nice with just the right patina.
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Thought the same thing after I received it, but Orange tank on a 360?? LOL
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Jay, I could swap (with some cash adjustment) a bead blasted and primered tank that has a few minor dings that would easily be fixed with a little bit of bondo ( bog to us Aussies ;D).
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Thanks for the offer, but I have a $9 tank on it's way that has badly faded paint and a number of small dings. I may spend the time to "Bondo" that one up and paint it black.
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DT1_Tank.jpg)
I put on a set of 13" Works Perf shocks on her today and she bounces nice now. I gotta get the forks to match the rear. $ $ $
Fix the forks and paint a tank and she is ready to race. ;D
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Thanks for the offer, but I have a $9 tank on it's way
Bugger!!! It would have been perfect for the 'DT1 from Hell' return. I've just got the old knee dented tank down from the shelf where it's been sitting for 13 years and found it still had methanol in it! It's the same colour as your tank...candy apple tangerine but mine has a black stripe. What happened there? Was there another model that used the same tank as the DT1? I got it NOS back in the late 80's from a dealer in Melbourne. Mine's also got the two mounts under the tank which are represented by blank raised sections on most DT1 tanks. My tank's odd black instead of white stripe has always been a mystery to me.
The tank I wanted to swap you was almost the same as your 9 buck beauty.
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Here is a pic of the GYT pipe and the Bassani:
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/RT-1pipe.jpg)
The Bassani pipe is laying flat on the ground while the first quarter of the GYT is curving upward.
Here's a RT3 Bassani...
(http://i374.photobucket.com/albums/oo184/IT400C/RT2/img-322141328_Page_5.jpg)
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That Bassani is just what you need Tony.
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This DT1s worth look, but it aint cheap though ;)
http://amsracing.com/product/973
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If Dave gets 15k for the Hindall I'll immediately put both of mine on the market for 10k apiece.
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Firko,
I have to confess that it wasn't hard to trap me into your evil DT cult, because of the remorse I feel over the one that I let slip away. Kind of a Sofie's Choice moment. About 6 years ago I bought a DT-2MX for $300 and after reading a few magazines that weren't very kind to the bike I decided to get rid of it. I took it in the back of my truck to an AHRMA event and sold it for what I paid for it in less than 20 minutes. That should have been a clue to me that it was worth holding on to. I've had sellers remorse ever since.
;)
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/MyDT2MX.jpg)
It was missing the front number plate, silencer and the left side-panel, but it was a running bike. :'(
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And so you should feel remorse Tahitian_Red . We have all done it , if only we knew then what we know now . the shame of it all . Iain :'(
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here is some thing nice on ebay itm no 320942167538
Hindall Framed Yamaha AT1 CT1 Vintage Motocross Bike VMX AHRMA 125 AT1mx GYT MX
(http://i1134.photobucket.com/albums/m612/Iain_Cameron/T2eC16dHJHwE9n8iiILBPKdNUw60_3.jpg)
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I've got lots of projects waiting but all this talk has pushed me to get my RT1 ready for next Septembers CD. This one started life as one of Nathan S's projects nearly 3 years ago. It's a racer so looks aren't priority but we'll have it looking pretty reasonable.
(http://i1087.photobucket.com/albums/j476/crossedup2/IMG_1388.jpg)
Tank still to get painted black with yellow strip. Waiting for rod kit to re-assemble the motor. MX360 gear set to go in. New rear shocks.
I have to thank Firko for an old frame he gave me which I ratted bits like the rear frame hoop which had been removed for some reason.
Peter B
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Mine is a yellow stripe model as well, I will see if I can find some yellow stripe stick on tape as my tank is presently plain black.
I wonder how many more yellow stripe models turn up there?
The more the merrier eh!
Looking forward to a great event!
Cheers pancho.
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I'm shooting for October for my RT-1. I sent the tank out to get painted the other day, the Works Performance shocks are bolted on and I'm installing the emulator forks this week. I added 30mm aluminum risers to get the Renthal Vintage bend bars up to a more comfortable height. I'll monkey around with ergos a little more (clutch and brake levers, shifter and footpegs), but that will be it until I race it a few times.
;D
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Here's how she looks with the painted tank. The only things I can think of for the future are install the RT-1MX cylinder and head, PVL with flywheel weight and maybe some Excel rims for strength and weight savings.
;D
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/DSCN0144.jpg)
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thats a sweet lookin bit of gear Red 8)
you'll enjoy the motor for sure. ;)
maybe not the buckin bronco :o
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Thanks Vandy!
The tracks I'll be racing on are pretty smooth (grass fields with some rolling hills or creek beds). I wouldn't want my "Batcycle" out on a toned down, semi-modern track. It does have sorted out Works Performance shocks, Emulator forks and an extended swingarm, but no frame lowering.
My current vintage (pre-75) bikes are a '74 Ossa Phantom and a Model 135 Bultaco Pursang. I may already be too spoiled to race the Beast much, but it's been a fun build so far!
;D ;D ;D
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Sweet job Jay. You've raised the bar a fair bit. I'll now have to try a little bit harder but the job will be a bit easier by my picking up the rarest of trick DT1 gizmos last week. I'm keeping schtum as to what it is until it's fitted to the bike but I can safely say you won't have seen this particular item on a DT1 for a loooong time ;D
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322 Big Bore Kit?
Jones Reed-Valve Cylinder?
Jones Cross-Over Pipe?
You got me thinkin' now Forko. ;D
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If you have a Jones light weight frame Mark Im going to go out to my shed and cry . Iain :'(
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Iainyz,
That would be the Holy Grail of the DT-1 stuff, but I'm thinking maybe he found the "Chalice from the Palace" (Mag Clutch Cover). ;D
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Iainyz,
That would be the Holy Grail of the DT-1 stuff, but I'm thinking maybe he found the "Chalice from the Palace" (Mag Clutch Cover). ;D
Hmmm.... I thought Firko once told me he already had one of these...
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Jones Triple-Clamps perhaps?
??? ??? ???
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Castrol sticker ;)
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I'll go with the Castrol sticker!
pancho
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Hmmmm....all wrong. This is even rarer than any of that Jones stuff. ::)
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im luving that airbox you made up there on the balck one..... you taking orders ? i want one or 2
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Different idea , just reading Cycle world Oct 69 and found a add for BN supply (US) offering reed kits for DT1's .. mmmmm Is a printed add in a magazine good enough proof ?
Iain
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im luving that airbox you made up there on the balck one..... you taking orders ? i want one or 2
Freaky,
It just an aluminum cover the previous owner built. A few more pieces of aluminum and it could be turned into a nice airbox.
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Here's a couple of shots of the immaculate RT1-MX seen at CD9................
(http://i1112.photobucket.com/albums/k495/firko2/CD9135.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/CD9136.jpg)
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It's beautiful. How did it run out on the track?
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It's beautiful. How did it run out on the track?
I didn't notice it on the track, I don't think he took it out but I might be wrong. I was told it's an unrestored original as well.
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Seeing that nobody guessed what my new trick DT1 part was, I might as well give you a glimpse. Jonesy bought these Swenco leading link forks off eBay for one of his projects but once we found that they'd formerly lived on a DT1 desert racer it was a no brainer as to what they to be used for. After a little wheeling and dealing the forks are now mine and will be fitted to the ex Nathan DT1 I'm fiddling with as a side project. I'll be using Arnaco shocks front and rear and the alloy front swingarm will be polished similar to the bottom photo of Alans other set of Swenco's that live on his Hodaka. I reckon these things are too cool. ;D
(http://i1112.photobucket.com/albums/k495/firko2/Swenco1.jpg)(http://i1112.photobucket.com/albums/k495/firko2/Swenco5.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/swencoleadinglink.jpg)
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It's beautiful. How did it run out on the track?
I didn't notice it on the track, I don't think he took it out but I might be wrong. I was told it's an unrestored original as well.
Rims are Not original.
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It's beautiful. How did it run out on the track?
I didn't notice it on the track, I don't think he took it out but I might be wrong. I was told it's an unrestored original as well.
Rims are Not original.
Well if you're gonna go there, the handlebars, front fender and tank badges are different also. I can't make out the footpegs. ;D
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Yeah, the more one looks at it the more obvious it becomes that it's probably had a wee bit of restoration. One of my pet hates on pre 75 bikes are Excel rims, I reckon it'd be a bit nicer (and more period correct) with Akront or Takasago mudcatcher rims. It's still a pretty nice bike though.
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How would the leading link forks work compared to standard Mark ? do they give a nice ride ?
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How would the leading link forks work compared to standard Mark ? do they give a nice ride ?
No idea Iain......I guess we'll find out next year when I get around to finishing the bike. I've ridden Jonesy's little Swenco equipped Hodaka and it felt OK until the engine blew up!
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I think the big benefit of leading link is that it takes a lot of the direct shock ( impact ) away from the handlebars.
They look sweet. What class of racing would they fall into?
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nice though as you said none even close . Mark sent you an answer about the DT2MX side covers on the its mine post .
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Mark sent you an answer about the DT2MX side covers on the its mine post .
Got it Iain, I just flicked over to the "It's Mine" thread. I'll use my translucent white DC MX250 and buy the oval one for the other side.
They look sweet. What class of racing would they fall into?
I'm not all that worried what class the bike actually falls into as it probably won't be raced, it's more a Classic Dirt fluck around bike. However, I'd like to think that it'd still fit into pre 70 as leading link forks are more fifties than seventies in concept.
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Mark sent you an answer about the DT2MX side covers on the its mine post .
Got it Iain, is the left side one the same as an MX250? They look the same..or very similar
They look sweet. What class of racing would they fall into?
I'm not all that worried what class the bike actually falls into as it probably won't be raced, it's more a Classic Dirt fluck around bike. However, I'd like to think that it'd still fit into pre 70 as leading link forks are more fifties than seventies in concept.
very close Mark they wrap around the frame a lot more at the front and have no bulge for the exhaust
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Here's a gem....an RT1 Motocross sidecar. I think this is one bike that really might have needed my leading link forks! I love the sharp edges on the tinwork on the side and the airfoil front numberplate, obviously to prevent the thing getting airborn at speed...classy.
(http://i1112.photobucket.com/albums/k495/firko2/dt1sidecar.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/dt1sidecar3.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/dt1sidecar2.jpg)
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must be Auzie post bike with mail box on side for number
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wonder where it is now . Hope it survived somehow .( note to self one can't save all of them ) Iain
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I suspect that if you bought these that concourse perfection isn't your main prority. ::)
http://www.ebay.com/itm/GAS-TANK-BADGES-SCREWS-1970-YAMAHA-DT1-250-DT1C-/360449912704?hash=item53ec7d2f80&item=360449912704&pt=Motorcycles_Parts_Accessories&vxp=mtr (http://www.ebay.com/itm/GAS-TANK-BADGES-SCREWS-1970-YAMAHA-DT1-250-DT1C-/360449912704?hash=item53ec7d2f80&item=360449912704&pt=Motorcycles_Parts_Accessories&vxp=mtr)
(http://i1112.photobucket.com/albums/k495/firko2/KGrHqRHJDE90wEGdUBPhJo3hbVg60_3.jpg)
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It's the screws Firko! It's hard to find an exact match at the bolt house or hardware store. ;)
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I found a reasonably close match at my local nut, bolt and screw joint. He told me that he may be able to get them in stainless steel but I haven't gone back for a while to follow up. I need some more so if he can get them in stainless I'll buy a box full and supply my 'bro's. 8)
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Restoration can often take away the soul of a bike. This little beauty has the pefect patina of a bike that's been used to within a nth of its life, god bless the anti bling movement.
(http://i1112.photobucket.com/albums/k495/firko2/roach74_1.jpg)
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I was just googling for something totally different and found this picture of my 'DT1 from Hell' taken while Peter Reynolds was making the trick fatty pipe for it. The pipe worked a treat all through the range and I've still got it stashed away. I only removed it because even I thought it was a bit of overkill for pre 70, especially in 1995 when the rules were even more strictly enforced. I'd never seen this photo of my own bike before, how cool is that?
(http://i1112.photobucket.com/albums/k495/firko2/DT1_3_zps9b10068d.jpg)
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Firko, that tank has to be the 'very very first' surely, i thought the remnants of mine was the first [well the tank relates to the ownership papers] at december "68, was candy apple gold [if that's what it's called] but yours has the lugs for the cross bracket. Think mine just has the flat spots where they decided against it for the next lot [you tell me!!] Cheers.
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That tank has always been a bit of a mystery. I bought it NOS still in the original Yamaha box from Mick Murnane in Melbourne in the early 90's. The things that makes it weird are the bottom mounts that you mention and, even more weird the black stripe instead of the white seen on every other gold tanked '69 DT1 I've ever seen. My restored DT1 is a genuine '68 white tanker and it doesn't have the bottom mounts so go figure that one out ??? ???.
BELOW: My DT1 from Hell with its gold tank/black stripe compared to the way it should be (middle shot). At bottom is my original DT1, note lack of bottom tank mounts?
(http://i1112.photobucket.com/albums/k495/firko2/dt1fhfirk2_zps2ffa35f2.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/Yam-1_zpscf1aca9f.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/dt1a_zpsce3514dd.jpg)
By the way Morley, I must apologise for not promptly replying to your PM but I was saving it and my other PM's to do them all together but that plan fell in the shit when I forgot all about it. I'll address the situation sometime this arvo...I promise ;D
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Its now painted over but my first DT has the same black pin stripe on gold . the only other strange item is the top left rear eng mount is on the down tube not on the cross bar ?
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Iain, the engine mounts are in the correct place. Even though the frame's been pretty thoroughly modified, I didn't touch the engine mounts. The frame originated in a 1970 yellow stripe RT1 basket case roller I found for free at a swapmeet. Maybe it's a trick of the eye brought on by the angle the photos taken? Your gold/black tank is the only other one I've heard of. Does it have the bottom mounts?
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No Mark I meant my eng mounts I'll post photos later . the tank has a flat spot for another fuel tap but no mounts .
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the first photo is 70 frame second is 68 and the last 2 are here to just gloat brand new never even had oil in them $250 (http://i1134.photobucket.com/albums/m612/Iain_Cameron/IMG-20130202-00180_zps2833cd3e.jpg)
(http://i1134.photobucket.com/albums/m612/Iain_Cameron/IMG-20130202-00179_zpsdfbc3109.jpg)
(http://i1134.photobucket.com/albums/m612/Iain_Cameron/IMG-20130202-00182_zps006e15e2.jpg)
(http://i1134.photobucket.com/albums/m612/Iain_Cameron/IMG-20130202-00181_zps2c0252b2.jpg)
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What's getting the Marzoccis? I get what you mean't with the engine mount now.
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I think the DT2mx that Pete has will get them .
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I think the DT2mx that Pete has will get them .
Cool, those Marzoccis are good shit and light years better than the Yamaha 34's. My RT2MX has magnesium Ceriani's with Pro-Fab triple clamps. We can't let the pre 90 blokes have a monopoly on trick stuff 'eh mate ;D? I've only ever seen two sets of 35mm mag Cerianis, the NOS set Jonesy's got and mine. Having said that Flowerpot Ben told me he has NOS items available.
That trick pipe you got does appear a tad short. If it is you should be able to lengthen the stinger/muffler end enough for it to clear the number plate.
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Gosh that white DT1 looks good, just as i recall mine 'new', [wait till ya see it now]-not strictly the same bike & wish i'd never sold the original, hell, how many times have we all said that!!.
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I know, I know, I don't really need this pipe but what the hell? I'm fairly sure it's a Hooker DT1/RT1 pipe which were the ducks guts back in 1971. If you had one of these on your DT1 you went up three levels in the cool stakes. They not only looked good, they actually worked pretty well....more than you could say about 90% of the other DT1/RT1 pipes from that era. Sadly the way cool chrome heat guard is missing but I'll eventually get one. http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=190793290710&ssPageName=ADME:L:COSI:AU:1123 (http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=190793290710&ssPageName=ADME:L:COSI:AU:1123). This will go on the ex Nathan DT1 that's getting the circa 1970 desert racer treatment with Preston Petty mudguards, Swenco leading link forks, Arnaco shocks, Webco head and as much period hot rod stuff I can put on it without going OTT. I got the pipe for a smidge under $50 which compares well to the bling bottom one which went for $225 on January 29.
(http://i1112.photobucket.com/albums/k495/firko2/hooker2_zpsf76bc686.jpg)
(http://i1112.photobucket.com/albums/k495/firko2/hooker_zps476ed39b.jpg)
Below: A Hooker pipe with all of the bling still attached.
(http://i1112.photobucket.com/albums/k495/firko2/hooker5_zps292ab836.jpg)
Below: I just got the stickers for inside the heart part of the heat guard....All I now need is the shiny bit ::).
(http://i1112.photobucket.com/albums/k495/firko2/hookerstickers_zpsf38e07f8.jpg)
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Good find Firko!
It looks just like the one on my RT-1. I'm missing the double heart shield also, but I'm happy with the Plain Jane look it has now.
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This thread is well named. Been following w interest & finally decided I better do something w that RT3 roller of my bro's. Have collected a few critical parts.
My first question - what are you guys using for airbox's?
Looks like many just use a pod.
Does anybody use the std rt1/2/3 airbox?
(If so, does it flow enough w a decent sized carb?)
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On my Hindall I've used a standard DT2MX airbox (with some extra vents). On the DT1 from Hell I used a plastic ice cream container containing a Uni-Filter but will probably use something a bit neater when I finally get to it. My ex Nathan bike has what looks to be a stock airbox but I haven't looked inside it. Welcome to the dark side John ;D.
PS I've located a leg shield for the Hooker pipe. Jonesy has donated it back to me, I'd totally forgotten that I'd donated it to his Rickman SL125 project a few years ago, thinking that I'll never find a pipe to suit. It just goes to show.....Never say never.
(http://i1112.photobucket.com/albums/k495/firko2/Wild20violet.jpg)
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John I used a Uni filter comp Pod # cp1 50/100 with a plastic tube 50mm round and a hose from an agri spares joint then zip tied in place . the side covers and a plastic sheet make up the air box . I'll post photos tomorrow . Iain
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Mini thread steal Is the baby Rickman/SL still about Mark? If so will it be at HBBB?
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Yeah it's still about but in need of a new tank after the methanol ate through the old fibreglass. He's replacing it with a later model steel version but it won't be at HBBB as there's only so much room on the trailer. He's taking his 850 Weslake twin flat tracker, Speedway Research (Offenhauser) powered speedway bike and (I think) His C&J B50 Beeza (or maybe Black Betty).
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Welcome to the dark side John ;D.
Thanks Mark. I've been lurking long enough & the move to Toowoomba has opened up more opportunities. Haven't yet got my bike stuff here, but I'm making plans & gathering parts (on several projects)
The plan is to give it split personality w a couple of diff options/incarnations as I have a few engines/top-ends. I've always liked the DT2Ms & having just picked up a cross-over pipe, one incarnation is planned to be reed-valve 250 engine, but perhaps in Vinduro guise. Plan to lower the frame cradle but not as much as some do as I still want reasonable ground clearance for Vinduro use.
I prefer 250s, but I've also got a 360 PP engine as an alternative pre70 bike. Also have RV 360 top ends, one ported a little.
May even get betor front end as I've got a few of them & my yam forks are rather rusty.
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John I used a Uni filter comp Pod # cp1 50/100 with a plastic tube 50mm round and a hose from an agri spares joint then zip tied in place . the side covers and a plastic sheet make up the air box . I'll post photos tomorrow . Iain
Pics would be great thanks Iain.
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excuse the fuzy photo .(http://i1134.photobucket.com/albums/m612/Iain_Cameron/IMG-20130220-00188_zpsa1b0c714.jpg)
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My Ballarat swap meet pod a few down pipe fittings just needs some paint to pretty it up. Its amazing what you can find if you wander around bunning's long enough.
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0188_zpscb55c5a7.jpg)
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0189_zpsadc7344d.jpg)
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0190_zps49dbf77e.jpg)
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0186_zps095aa894.jpg)
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0182_zps32cdf4cd.jpg)
(http://i1058.photobucket.com/albums/t418/mavman4200p/DSCN0180_zps813c6f12.jpg)
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That's neat.........and oh so DT1 perfect ;).
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I'm gonna try that Air-Filter trick!
After looking at those pics of the RT-1MX ad CD9 several times over the last few months I couldn't help myself and order Excel rims and HD stainless spokes for the RT-1. I'm going to add as many aluminum YZ type pieces and maybe a Ti bolt or two. I'll post photos as soon as I have it finished. It is a sickness isn't it?
;D
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I moved this over from the resto thread where it didn't really fit in
The Rat Bike Project:
This bike isn't so much a restoration as a 'retrofit'. I purchased the bike from Nathan a year or so ago to use the engine and parts in one of my Hindall frames but a change in direction on that project saw the DT1 sitting in a corner doing nothing. Then, a couple of weeks ago I had the brainstorm of using it for what Nathan originally built it for...a cheap and cheerful pre 70 racer without the unnecessary bling that adorns some of my other VMX bikes. Nathan had the bike set up fairly well but I didn't like the MX250 tank and plastic so I dug into the period stash and came up with the steel back mudguard from the original 'DT1 from Hell', a NOS A&A plastic front 'guard mounted using GYT mounting hardware, a '68 DT1 tank with original paint and an original seat that had been replaced with a better one on my restored DT1. I fitted a Webco head, GYT cylinder and PVL ignition to the engine and replaced the home made pipe with a GYT item. The plan with the bike was to build a reasonably competitive 250/pre 70 class bike for as little money as I could using as many period correct parts as possible and looking like it had caught a time machine from Foster Park or Christmas Hills, circa 1970. Rob Dillon from WA will be riding it at the Wyaralong Nats in November and while the bike probably isn't the most competitive in its class, I think it'll be a more than capable race bike with someone on board not intimidated by the DT1's handling reputation . After the Nats it'll slip into the role of being a loaner for friends and riders who want to try VMX for the first time. I think we'll all have some serious fun on this little bike ;D.
*The Arnaco shocks will be replaced with period finned alloy Works Performance items once I rebuild them
*The forks will be replaced with a similar set fitted with Race Tech gold valves and trick springs that currently live on my Hindall project. (That themselves are being replaced with Can-Am Betors.)
*The DANGEROUS Chinese Gunnar Gasser copy throttle will be replaced with a genuine item as soon as it arrives from the USA.
*The cables will all be replaced with correct length genuine grey Yamaha cables...probably tomorrow.
*I'll fabricate a sprocket cover to keep the scrutineers happy.
*I have a period Skyway silencer for the GYT pipe but currently can't find it. It'll turn up :-[.
* I have to find a neat way to mount the pipe side number plate.
(http://i1112.photobucket.com/albums/k495/firko2/dt1nathan.jpg) (http://s1112.photobucket.com/user/firko2/media/dt1nathan.jpg.html)
The bike as I bought it from Nathan
(http://i1112.photobucket.com/albums/k495/firko2/DT1fromHell2005_zps7929e7ac.jpg) (http://s1112.photobucket.com/user/firko2/media/DT1fromHell2005_zps7929e7ac.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/DT1fromHell2002_zps84871ea8.jpg) (http://s1112.photobucket.com/user/firko2/media/DT1fromHell2002_zps84871ea8.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/DT1fromHell2006_zps1da904a1.jpg) (http://s1112.photobucket.com/user/firko2/media/DT1fromHell2006_zps1da904a1.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/DT1fromHell2011_zps15a58300.jpg) (http://s1112.photobucket.com/user/firko2/media/DT1fromHell2011_zps15a58300.jpg.html)
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hey Firko I like it, looks like its original and well set up, that clutch actuator looks tuff ;) :)
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Nice Mark I think the DT\RT bug has caught on , we used to be the only silly buggers now if you don't have one your not cool . Iain
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You can't replicate original patina. It would be a crime to remove this University of NSW Kensington campus parking pass from 1972. The remnants of the 1970 and '71 stickers were there as well but I removed them before I realised my mistake. :-[ :-[
(http://i1112.photobucket.com/albums/k495/firko2/DT1fromHell2004_zpsf61c8914.jpg) (http://s1112.photobucket.com/user/firko2/media/DT1fromHell2004_zpsf61c8914.jpg.html)
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Nice Mark I think the DT\RT bug has caught on , we used to be the only silly buggers now if you don't have one your not cool . Iain
I've recently had a couple of blokes from the Evo side of the fence ask me if I had any DT1 or RT1 bikes or parts for sale because they like the idea of a Yamaha pre 70 racer. If I didn't have so much on my plate I'd get stuck into the DT1 from Hell rebuild....it's all there, the engine's built but I just need the time. Because I've already got three pre 70 bikes the priority isn't there for me right at the moment.
We seem to have started a slow spreading DT1 virus Iain ;D.
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I blame my latest addiction on Firko and these two gentlemen:
(http://i1101.photobucket.com/albums/g438/Tahtitian_Red/0_a738d_fe3f42b5_XL_zpsf4236475.jpg)
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I blame my latest addiction on Firko and these two gentlemen:
It's funny how things roll.....I'm essentially a Maico guy who got bored with the same old same old and needed a change of scenery. That slight deviation to build my Cheney RT1 reminded me just what a great engine those old Yamahas have and my new RT1/DT1 obsession was born. I'm starting to enter that same old, same old mode again however so next year I'm embarking on a yet another new direction....building both pre 60 class 500 TriBSA and 650 Triumph pre 65 motocrossers and assembling my Shell OW72 flat tracker. If I get overwhelmed by all that 4 stroke complexity I'll have my Maico Metisse pre 65 project to go to as a sanctuary of familiarity :). I love entering into unknown areas and learning new things about bikes I previously knew little about. That's the fun part for me.
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While surfing google images I came across one of the few DT1 Cheney's I've ever seen. It's frame #43 compared to my #14. Frame #12 was found in almost beyond help condition in a barn in Massachusetts. Mine's the only restored one I've ever seen so what happened to the rest of them?
(http://i1112.photobucket.com/albums/k495/firko2/cheneyYamaha2jpg_zps752d0a70.jpg) (http://s1112.photobucket.com/user/firko2/media/cheneyYamaha2jpg_zps752d0a70.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/cheneyrt1_zpsfb27a6e0.jpg) (http://s1112.photobucket.com/user/firko2/media/cheneyrt1_zpsfb27a6e0.jpg.html)
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Bugger I tried to resist, Im a Suzuki guy, it couldnt happen to me, I luv side cars ??? :P :-\ :o cant believe it now have a RT incompltete but I like it, ive got the bug, ??? what is it about these bikes ;) :) :D ;D 8)
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Shelpi give me a call if your after any parts , Ive finished my 3 RT's and have quite a few leftovers . Iain . ps welcome to the DT\RT tragic club .
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??? what is it about these bikes ;) :) :D ;D 8)
I think it's three things......The bikes place in dirt bike history, that beautiful little engine and last but not least, the hot rod factor. The aftermarket motocross accessory industry was formed on the DT1's need for improvement. You don't have to do too many laps on a stock DT1 to find that they're not designed to win races so that's where the fun in owning one come in. We can fit alloy rims, lightweight hubs, Betor or Ceriani forks, lower the frame cradle and lengthen the swingarm, port the livin' shit out of the barrel, fit a Webco or GYT head, change the pipe over to something that works, fit plastic Preston Petty 'guards, and hacksaw 20 lbs of weight out of it, each little mod improving the old bike one micro at a time. There are a myriad of period trick parts out there on eBay for comparatively little money and the old magazines are full of How-To articles on improving the bike.
Back in 1992 I'd been racing my Maicos quite happily in the knowledge that I owned close to the best in the class when over a few bottles of red Geoff Eldridge came up with the 'challenge' of me building a racer out of leftover parts and he restoring an original bike with us creating an ADB magazine piece on both bikes transformations. Unfortunately GE was killed before he could start his project* but I built my racer, soon christened the 'DT1 from Hell' in honour of my friend. That bike was one of the most enjoyable builds I ever did because I let my imagination run wild. The only restriction I had was the rulebook. The bike went on to come second to Boagy in pre 70 at two Nats in a row and won a dirt track Nats....pretty good for a 500 buck hacksaw and Oxy welding special. I only mention the DT1 from Hell to raise the point that these old cut and shut DT1/RT1s bring out the Doctor Frankenstein mad hot rodder that lays dormant within many of us. They can be as cheap or expensive as you want then to be or as trick or stock as you like. The engine is one of the all time great dirt bike engines and can be modified to your hearts content and remain as reliable as a Kenworth diesel. While our conscience wouldn't allow us to hack up a Husky, CZ or Maico to build a pre 70 Frankenbike, we don't feel so bad modifying a DT1 or RT1.
* I ended up with the DT1 basket case that Geoff had bought to restore and 15 years after his death I finally completed the job. I still own it.
(http://i1112.photobucket.com/albums/k495/firko2/dt1fhfirk2_zpse38cb4b7.jpg) (http://s1112.photobucket.com/user/firko2/media/dt1fhfirk2_zpse38cb4b7.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/dt1a_zpse1c9bdfa.jpg) (http://s1112.photobucket.com/user/firko2/media/dt1a_zpse1c9bdfa.jpg.html) [
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Shelpi give me a call if your after any parts , Ive finished my 3 RT's and have quite a few leftovers . Iain . ps welcome to the DT\RT tragic club .
cheers for that, the big lump that the jug sits on is the main missing part :( Ive even got the original black tank with the red stripe ;D no drinking straws up front, other than that its a start ;)
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??? what is it about these bikes ;) :) :D ;D 8)
I think it's three things......The bikes place in dirt bike history, that beautiful little engine and last but not least, the hot rod factor. The aftermarket motocross accessory industry was formed on the DT1's need for improvement. You don't have to do too many laps on a stock DT1 to find that they're not designed to win races so that's where the fun in owning one come in. We can fit alloy rims, lightweight hubs, Betor or Ceriani forks, lower the frame cradle and lengthen the swingarm, port the livin' shit out of the barrel, fit a Webco or GYT head, change the pipe over to something that works, fit plastic Preston Petty 'guards, and hacksaw 20 lbs of weight out of it, each little mod improving the old bike one micro at a time. There are a myriad of period trick parts out there on eBay for comparatively little money and the old magazines are full of How-To articles on improving the bike.
Back in 1992 I'd been racing my Maicos quite happily in the knowledge that I owned close to the best in the class when over a few bottles of red Geoff Eldridge came up with the 'challenge' of me building a racer out of leftover parts and he restoring an original bike with is creating an ADB magazine piece on both bikes transformation. Unfortunately GE was killed before he could start his project* but I built my racer, soon christened the 'DT1 from Hell' in honour of my friend. That bike was one of the most enjoyable builds I ever did because I let my imagination run wild. The only restriction I had was the rulebook. The bike went on to come second to Boagy in pre 70 at two Nats in a row and won a dirt track Nats....pretty good for a 500 buck hacksaw and Oxy welding special. I only mention the DT1 from Hell to raise the point that these old cut and shut DT1/RT1s bring out the Doctor Frankenstein mad hot rodder that lays dormant within many of us. They can be as cheap or expensive as you want then to be or as trick or stock as you like. The engine is one of the all time great dirt bike engines and can be modified to your hearts content and remain as reliable as a Kenworth diesel. While our conscience wouldn't allow us to hack up a Husky, CZ or Maico to build a pre 70 Frankenbike, we don't feel so bad modifying a DT1 or RT1.
* I ended up with the DT1 basket case that Geoff had bought to restore and 15 years after his death I finally completed the job. I still own it.
(http://i1112.photobucket.com/albums/k495/firko2/dt1fhfirk2_zpse38cb4b7.jpg) (http://s1112.photobucket.com/user/firko2/media/dt1fhfirk2_zpse38cb4b7.jpg.html)
(http://i1112.photobucket.com/albums/k495/firko2/dt1a_zpse1c9bdfa.jpg) (http://s1112.photobucket.com/user/firko2/media/dt1a_zpse1c9bdfa.jpg.html) [
Bravo Firko ;) :) :D ;D 8)
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cheers for that, the big lump that the jug sits on is the main missing part
Are you looking for a piston port barrel? Unfortunately they're pretty scarce but they occasionally come up on USA eBay. I only have one spare that I need to keep but I can give you a reed barrel to get you going.
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cheers for that, the big lump that the jug sits on is the main missing part
Are you looking for a piston port barrel? Unfortunately they're pretty scarce but they occasionally come up on USA eBay. I only have one spare that I need to keep but I can give you a reed barrel to get you going.
have got 2 barrels one is piston port other reed job, thank you for the offer Firko :) ;) its the big alloy lump under the barrels that is missing :o
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its the big alloy lump under the barrels that is missing
Oh....that little thing ::)
(http://i1112.photobucket.com/albums/k495/firko2/RT1MXA_zpscec0451e.jpeg) (http://s1112.photobucket.com/user/firko2/media/RT1MXA_zpscec0451e.jpeg.html)
The RT1-MX would have to be one of the prettiest motocross bikes ever in my biased opinion.
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its the big alloy lump under the barrels that is missing
Oh....that little thing ::)
(http://i1112.photobucket.com/albums/k495/firko2/RT1MXA_zpscec0451e.jpeg) (http://s1112.photobucket.com/user/firko2/media/RT1MXA_zpscec0451e.jpeg.html)
The RT1-MX would have to be one of the prettiest motocross bikes ever in my biased opinion.
Yep that's the one ;) except we haven't got the shiny bit with Yamaha written on it :-[ it is a hansome steed ;) indeed
say has anyone got a spare bottom end :P please ;)
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i can lend you one pete
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Hey ian do you have any decent crank haves for the 360 ? specially the the mag side ?
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i can lend you one pete
Thanx Freaks its ok, this build is a come as you are, so no problems, will happen when its time, ;) 8)
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Jay, from what I'm reading online, the AHRMA has voted down the Early Sportsman class. Where does that leave your RT1 project now?
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I was looking for the vote the other day and couldn't find it. Early Sportsman Stock (ESS) has been an AHRMA regional class (Northern Cal and Oregon) the last few years and hopefully it will be run again in 2014. I do not travel around to the AHRMA National MX events much anymore. I was lucky enough to have won 2 AHRMA National Championships and the fire ($) just isn't there anymore.
I was probably going to sell the RT-1 after racing it a few times anyway. The RT2MX/YZ project is the only bike I want to build anyway. I am only holding on to completed bikes that are ready to race with simple maintenance between events. I'm keeping it simple and casual from here on out.
;)