OzVMX Forum

Clubroom => Bike Talk => Topic started by: Bioflex on November 25, 2010, 09:28:26 pm

Title: 4 stroke class, weapon of choice?
Post by: Bioflex on November 25, 2010, 09:28:26 pm
As far as I know the 4 stroke class is run as per 85, so the bulk of bikes would likely be 78 to 84.

For those attend busy race meetings or even ride a 4 stroke themselves, is their a preferred bike, one that has a competitive edge over the opposition?
Is the KTM 4 stroke the only one made before 85 that manages a disc brake?

I know XR's and Can Am's made before this time ran drums as did the husky's. Not that a disc is everything but it would probably be a bigger advantage than anything else.

What are people generally riding in this class?
Title: Re: 4 stroke class, weapon of choice?
Post by: Nathan S on November 25, 2010, 09:49:35 pm
Not that I've ridden a 4-stroke KTM, but those early Euro discs were crap. I'd prefer a TT600 with the twin leader any day (any day when its not raining, at least).

The '84 XRs had the disc. Its easily the best brake of the bikes mentioned.

Locally, the class is a real mixed bag - Den's KTM, a couple of KLX250s, a TT250H (soon), Paul's "Kawasaki XT", Dan's XR500, the occasional HL500 replica, etc.
Title: Re: 4 stroke class, weapon of choice?
Post by: LWC82PE on November 25, 2010, 10:53:08 pm
Quote
Is the KTM 4 stroke the only one made before 85 that manages a disc brake?


84 XT600 has disc

also what about 83/84 XL600, i think they have disc Y/N
Title: Re: 4 stroke class, weapon of choice?
Post by: Bioflex on November 25, 2010, 11:15:14 pm
How are those XR 500's like to ride?
I've kinda been tempted by them, but the thought of throwing a bike that is more oafish and heavier than my XR600 over jumps is scary. The 600 I have is a bit newer (91 model) so I figured it would actually feel a bit better than the older 500's, could be wrong though.

The four strokes really do look like a mixed bag, surprised no one is running a Husky, they certainly look the best.
Title: Re: 4 stroke class, weapon of choice?
Post by: Rossvickicampbell on November 26, 2010, 08:57:40 am
one of the guys over here is riding a TE 510 I think it is - certainly looks the goods!!!!
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on November 26, 2010, 09:24:02 am
I'll probably get run over by a truck for saying this but I find myself agreeing with Nathan ;D. My choice would also be a TT600 Yamaha. I owned one for years and in that time thoroughly mistreated it yet it never, ever let me down. Sure they're heavy, but so is an XL Honda and the TT has the benefit of good suspension, good brakes and an engine that loves being hammered. You can do copious amounts of mods to the engine as well. My mate in the US Marsh Runyon had his out to nearly 800cc I believe. A couple of Aussies raced it while over there including (I think) this forums Yamaico and all reports were that it was a real weapon.
Title: Re: 4 stroke class, weapon of choice?
Post by: VMX247 on November 26, 2010, 10:06:55 am
one of the guys over here is riding a TE 510 I think it is - certainly looks the goods!!!!

Will let you know 100% after tomorrows Bridgetown Grass Track as the A Grader on this 510 will be giving his usual all !!
Besides our XL350 (cause its in our shed ) I'd say this Husky 510 would be the next choice for a throughbred 4 stroke   :P  :P  :P very nice thumper !!
cheers
Title: Re: 4 stroke class, weapon of choice?
Post by: Ktm181 on November 26, 2010, 10:24:15 am
As far as I know the 4 stroke class is run as per 85, so the bulk of bikes would likely be 78 to 84.

For those attend busy race meetings or even ride a 4 stroke themselves, is their a preferred bike, one that has a competitive edge over the opposition?
Is the KTM 4 stroke the only one made before 85 that manages a disc brake?

I know XR's and Can Am's made before this time ran drums as did the husky's. Not that a disc is everything but it would probably be a bigger advantage than anything else.

In my opinion, from back then, the ONLY bike that was competitive was a Husky, doesnt matter if CR/WR etc, '83-'84 were REALLY FAST, a pig to start when hot, but had heaps of power & handled well.  Expensive to maintain,ran hot as hell, but were bloody good for a 4 banger, even good for holeshots against 500 2st!

Kt





Title: Re: 4 stroke class, weapon of choice?
Post by: NR555 on November 26, 2010, 12:41:24 pm
No question here.  My four stroke (and even VMX in general) weapon of choice would be a 78 CCM Works replica.  Almost an unfair advantage in 4 valve form.  A Maico 490 struggles to get near one of these off the start.  Sheer, tractable horsepower in a great chassis.

Here's the CCM man himself, Jimmy Aird, handing a bunch of two strokes a sound beating.  Take note of the acceleration out of the turns:

http://www.youtube.com/watch?v=y6NCiDt1bm8 (http://www.youtube.com/watch?v=y6NCiDt1bm8)

If you've got a spare $30K, you can get a new one built for yourself.  This is why you don't see them anywhere!
Title: Re: 4 stroke class, weapon of choice?
Post by: brent j on November 26, 2010, 12:47:42 pm
And a bit of Jimmy Aird's talent wouldn't go amiss either ;D
Title: Re: 4 stroke class, weapon of choice?
Post by: NR555 on November 26, 2010, 12:50:30 pm
And a bit of Jimmy Aird's talent wouldn't go amiss either ;D

No question there either!
Title: Re: 4 stroke class, weapon of choice?
Post by: bazza on November 26, 2010, 12:55:42 pm
pop over to Unzud and see Mr aird racing!!!
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 26, 2010, 01:32:31 pm
I'll probably get run over by a truck for saying this but I find myself agreeing with Nathan ;D. My choice would also be a TT600 Yamaha. I owned one for years and in that time thoroughly mistreated it yet it never, ever let me down.

Yep normally my TT600 is the only one of my bikes that actually runs 100% of the time. Stone cold reliable, more grunt that a barnyard of pigs.
Title: Re: 4 stroke class, weapon of choice?
Post by: shorelinemc on November 26, 2010, 04:56:51 pm
well for pre 78 building a RM370 with a TT500 motor in it something different to HL/HUSKY/MAICO frames dont know if it will work or not
Title: Re: 4 stroke class, weapon of choice?
Post by: head on November 26, 2010, 06:40:39 pm
I am currently building a 82 XR500 motor in a YZ250L chassis. Its a tight squeeze, but I think it will be a good thing. Had a spare frame lying around.
Title: Re: 4 stroke class, weapon of choice?
Post by: Slakewell on November 26, 2010, 06:56:02 pm
The big Rotax KTM's are not that common , the first disk brakes were not better than good twin leading shoe drum brakes at the time. Haveing not ridden a CJ XR 500 I would still think the Husky being lighter then KTM would be best. 
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 26, 2010, 07:49:57 pm
well for pre 78 building a RM370 with a TT500 motor in it something different to HL/HUSKY/MAICO frames dont know if it will work or not

Been done a few times but good thought, TT500 motor fits N/T frame like a cock in a sock, looks better than HL almost.

(http://i245.photobucket.com/albums/gg71/marcFX_photo/rmframett.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 26, 2010, 07:52:06 pm
if money was no object and you still believe the sun hasn't set on the empire ;D

(http://i245.photobucket.com/albums/gg71/marcFX_photo/CCM1-1.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: brent j on November 26, 2010, 07:53:52 pm
well for pre 78 building a RM370 with a TT500 motor in it something different to HL/HUSKY/MAICO frames dont know if it will work or not

I'm told by an old time rider that a bike like this was built in Alice Springs in the late 70's.
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 26, 2010, 08:19:40 pm
did it look anything like this ..... sweet, frames are cheap and piece of cake to build/

plus it avoids the plague of 4 stroke specials.... f&%k ugly side covers

(http://i245.photobucket.com/albums/gg71/marcFX_photo/1108.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: brent j on November 26, 2010, 08:50:58 pm
From what he said it still had the alloy RM370 tank.

He had no idea what they did about an oil tank tho
Title: Re: 4 stroke class, weapon of choice?
Post by: VMX247 on November 26, 2010, 09:53:04 pm
well for pre 78 building a RM370 with a TT500 motor in it something different to HL/HUSKY/MAICO frames dont know if it will work or not

I'm told by an old time rider that a bike like this was built in Alice Springs in the late 70's.

is it the one that ran in the Finke--its on here somewhere ??
cheers
Title: Re: 4 stroke class, weapon of choice?
Post by: flower pot racing on November 26, 2010, 11:27:51 pm
If you've got a spare $30K, you can get a new one built for yourself.  This is why you don't see them anywhere!

There is one for sale in the UK at the moment.  It's a chuffing bargain.  There is no way you could build a bike of that quality for the money.  No question the starting bid isnt a give away, but if you have ever put together a high spec bike then you'll understand the time, effort and of course money that is required to 'do it right'.

It's original owner is the most meticulous I know.  Everything correct and in it's place.  When running, the noise was like a modern bike.  Magnificent.

Riding one of that quality some how gives you an unfair advantage......

Wouldnt mind having it in my garage!
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 08:18:41 am
Riding one of that quality some how gives you an unfair advantage......

maybe against another old Pommy clanker, but lets face it CCM didn't have a pile of world titles in its day and sort of just had a novelty factor that it was the last gasp of B50. I would also question the modern CCM reps as they are in the same league as Manx Norton reps where modern production and materials makes them run harder than  they never did in the day.
Title: Re: 4 stroke class, weapon of choice?
Post by: shorelinemc on November 27, 2010, 09:15:45 am
From what he said it still had the alloy RM370 tank.

He had no idea what they did about an oil tank tho
i have fitted the oil tank under the seat,running a pod filter,using all rm370 tank,plastics.rebuilding the motor at the moment mild one -wossener hi comp piston 076 waggot cam 38mm mikuni.custom tranzac pipe
Title: Re: 4 stroke class, weapon of choice?
Post by: flower pot racing on November 27, 2010, 09:57:00 am
Riding one of that quality some how gives you an unfair advantage......

maybe against another old Pommy clanker, but lets face it CCM didn't have a pile of world titles in its day and sort of just had a novelty factor that it was the last gasp of B50. I would also question the modern CCM reps as they are in the same league as Manx Norton reps where modern production and materials makes them run harder than  they never did in the day.

You guessed right.  Should the desire take you, you can really get a unit BSA motor going very very fast....
Title: Re: 4 stroke class, weapon of choice?
Post by: Davey Crocket on November 27, 2010, 10:09:01 am
Pretty much any 4 stroke engine can be made to haul arse.....all is required is a black Amex card ;)....the technology available today is quite amazing and nothing beats the sound of a well tuned engine.......tell me, who doesnt get a horn on when they hear a Ducati V-twin go by....arh-la 916/996/998......I'm sure Ducati start with an exhaust system note and build an engine around it.......where as some companies start with an oil leak and build an engine around it.....eg...anything British, any Ford engine...... ;)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 10:41:21 am
Pretty much any 4 stroke engine can be made to haul arse.....all is required is a black Amex card ;)....

the B50 motor is not a bad thing, it is compact and not heavy, then after you replace the gearbox, barrel, rod, piston, cam and clutch they can make 50 hp and really hold together. Bit like modifying a Harley really.

there is a conversion to fit a Ducati desmo head to B50 bottom end for the best of both worlds
Title: Re: 4 stroke class, weapon of choice?
Post by: TM BILL on November 27, 2010, 11:26:32 am
Now Marc I let the Bezza with the fugly upside down forks slide  ::) But please dont ever mention BSA and those shit Yank tractors in the same sentence again  ;) Im off for a lie down now  :)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 02:14:57 pm
Well back to the story, I think TT500 motor in RM frame needs to be explored more. We dropped one in old PE frame we had about and it fitted sweet, build an oil tank and bolt the suspension of your choice on and you are there.

Looks a lot better than some of the appalling XL350 powered KLXs and stuff. Or why not YZ XL

(http://i245.photobucket.com/albums/gg71/marcFX_photo/MarcsFrame012.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: NR555 on November 27, 2010, 02:18:53 pm
How stupid does that HL look?  They all look like they've been squashed from either end and they've popped upwards a few inches to compensate.

I saw that CCM on ebay uk.. that thing is definitely mint.  Wish I had the bucks.
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on November 27, 2010, 03:12:24 pm
Even though I earlier showed preference for the trusty TT600, I reckon the ATK 560/605 would have to be a good thing. The Rotax engine is an all time classic race engine that's still winning dirt track races over newer Japanese time bombs in the USA.
       (http://img.villagephotos.com/p/2005-8/1062154/ATK560a.jpg)
       (http://img.villagephotos.com/p/2005-8/1062154/ATK560b.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 03:35:50 pm
too true Firko and you can swap gas tank with your TT if you need to. I really like the ATK
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on November 27, 2010, 04:43:45 pm
Quote
too true Firko and you can swap gas tank with your TT if you need to. I really like the ATK
And best of all you get all of the cool hot rod acessories in the one package. C&J frame, Whitepower suspension, Brembo brakes and all sorts of great nic nacs you'd spend months searching eBay for if you were building a special*.

* As we are for a fellow Klub Kevlar member. We're currently assembling the components to build a Honda XL500S powered KLX Kawasaki. It's to be an extremely lowbuck affair using a Nathan procured KLX frame, another mates cast off IT490 Yamaha forks and front wheel, the engine and rear wheel from the XL500s basket case donor bike, shortened 83 Husky Ohlins ITC shocks and all sorts of other project leftovers. I reckon it'll come in under 2k. By coincidence another KK good 'ol boy, Yamaico is building a similar project, also with a 2k budget in mind. You'll all remember his step by step 465 Yamaha flat tracker build from last year on this forum so you know the quality he achieves in his el cheapo builds.

As I've said numerous times in the past, building specials need not be an expensive operation as you aren't limited by a particular game plan. You can make it up as you go, the only limits being the rulebook,your imagination and ability to find bargain components 8).
Title: Re: 4 stroke class, weapon of choice?
Post by: Slakewell on November 27, 2010, 05:13:03 pm
I allways was interested in these

(http://img718.imageshack.us/img718/2682/huskys.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: dave on November 27, 2010, 05:19:23 pm
Quote
Honda XL500S powered KLX Kawasaki
sounds like a fun bike! Very interested to see what it come out like, always thought the XL500 donk went well
Title: Re: 4 stroke class, weapon of choice?
Post by: bazza on November 27, 2010, 06:09:14 pm
rm370 with XL350 big bore was popular back in the day
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 06:21:13 pm
Quote
Honda XL500S powered KLX Kawasaki
sounds like a fun bike! Very interested to see what it come out like, always thought the XL500 donk went well

Mark Meadows went in this direction bike went like hell and looked great/
Title: Re: 4 stroke class, weapon of choice?
Post by: Captain Bilko on November 27, 2010, 06:24:45 pm
I just luv waving to those guys on those HL thingy things when I pass them....... Wizard!
How stupid does that HL look?  They all look like they've been squashed from either end and they've popped upwards a few inches to compensate.

(and yes they do look strange Neile! :D)
Title: Re: 4 stroke class, weapon of choice?
Post by: JohnnyO on November 27, 2010, 06:54:39 pm
Quote
Honda XL500S powered KLX Kawasaki
sounds like a fun bike! Very interested to see what it come out like, always thought the XL500 donk went well

Mark Meadows went in this direction bike went like hell and looked great/
That bike of Meadows was awesome and very fast.. Roy Gay had it for a while til it put a rod through the cases at Conondale a couple of years back. Don't know where it ended up after that.
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 09:58:31 pm

That bike of Meadows was awesome and very fast.. Roy Gay had it for a while til it put a rod through the cases at Conondale a couple of years back. Don't know where it ended up after that.
[/quote]

Hopefully it is still alive or someone wants to sell it to me as part of my Meadows collection.
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 27, 2010, 10:00:27 pm
Heres Erics take on the battery box and air cleaner.... its nice and tidy

(http://i245.photobucket.com/albums/gg71/marcFX_photo/IMG_3479.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on November 27, 2010, 11:36:13 pm
Quote
That bike of Meadows was awesome and very fast.. Roy Gay had it for a while til it put a rod through the cases at Conondale a couple of years back. Don't know where it ended up after that.
Roy still owns Cocky Meadows old KLX Honda. He had it at the Nepean Magoo Dirt Track in August but was still having problems getting the tuneup right. He rode it on the Saturday but he and the bike were no shows on Sunday.
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 28, 2010, 02:26:47 am
I havn't got a picture handy, of course XR motor will also go into twin shock CR frame.
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on November 28, 2010, 10:44:56 am
Quote
the B50 motor is not a bad thing, it is compact and not heavy, then after you replace the gearbox, barrel, rod, piston, cam and clutch they can make 50 hp and really hold together. Bit like modifying a Harley really. There is a conversion to fit a Ducati desmo head to B50 bottom end for the best of both worlds
After you've spent a squillion on your Beeza you can then fit it into the '82 Maico that had previously donated its reed 490 engine for your Frankenstein project and Voila.........you've got the perfect pre 85 4 stroke motocrosser ::)
                     (http://img.villagephotos.com/p/2005-8/1062154/maicobsa.jpeg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 28, 2010, 12:04:48 pm
yes you could or you could build something as clean as the KLX XR we mentioned already. I mean the great thing about 4 stroke specials is the path to greatness is really only limited by your ability to fabricate engine mounts.

(http://i245.photobucket.com/albums/gg71/marcFX_photo/Cocky20Meadows20XR5701.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 28, 2010, 12:07:07 pm
Or Firko go the other way and kick out the BSA engine and whack in a Honda, makes far more sense
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 28, 2010, 12:08:51 pm
OR get the Husky roller I have and pop a Honda in it.....

(http://i245.photobucket.com/albums/gg71/marcFX_photo/PROJECT011.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: brebel on November 28, 2010, 01:04:07 pm
Even though I earlier showed preference for the trusty TT600, I reckon the ATK 560/605 would have to be a good thing. The Rotax engine is an all time classic race engine that's still winning dirt track races over newer Japanese time bombs in the USA.
       (http://img.villagephotos.com/p/2005-8/1062154/ATK560a.jpg)
       (http://img.villagephotos.com/p/2005-8/1062154/ATK560b.jpg)

Yes I agree, the Rotax is a classic ,why? because I am impressed with its power delivery- it revs like an engine half its size, is well engineered and easy to work on, has roller bearings throughout and the belt driven cam is a gem.(http://i210.photobucket.com/albums/bb259/brebel327/myKTM003.jpg) 
If there is an enduro or vmx meeting in NSW coming up please let me know, I am keen to test her out.
Title: Re: 4 stroke class, weapon of choice?
Post by: Nathan S on November 28, 2010, 03:36:11 pm
I was quite impressed by the 300cc+ KLX powered RM125C that was as CD7. I didn't see it in action, but the owner reckons it hammers.

Apparently a fair bit lighter and better handling than a stock KLX - certainly a lot nicer to look at.



Title: Re: 4 stroke class, weapon of choice?
Post by: Bioflex on November 29, 2010, 04:59:27 pm
MarcFX, how much do you want for the Husky roller?
Feel free to Pm me if you would prefer, also why do you suggest a Honda motor, are the mounts modified to fit a Honda?

I didn't realise all of these Frankenstiens were legal, I assume it all has to be pre 85?

The ATK looks like an awesome tool, the later models seem to pop up on U.S ebay but haven't seen an 83/84 model come up yet.
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on November 29, 2010, 05:50:31 pm
MarcFX, how much do you want for the Husky roller?
Feel free to Pm me if you would prefer, also why do you suggest a Honda motor, are the mounts modified to fit a Honda?

thanks for the offer but I will keep the Husky mate, I have plans for it but it may not include an XR500 engine.

(http://i698.photobucket.com/albums/vv346/2whldreams/DSC00037.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: DP on December 10, 2010, 01:26:44 pm
Firko
The ATK560 is a cool bike ,I had a 1985 560 & still have a 84 560 that has been taken out to 614cc.
They handle good although a little top heavy. The rear end works real well although the disc brake on the sprocket use to heat up quickly so the rear drum is the way to go,(it saves a few questions about being legal for VMX as well )
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on December 10, 2010, 01:58:05 pm
Old school build HL rep may even get you pre 78 class dominance, lot of people like the early HL look with shorter suspension travel. I likem tall like block of flats myself.

(http://i245.photobucket.com/albums/gg71/marcFX_photo/HL500_profab_750.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: evo550 on December 11, 2010, 06:46:04 pm
There's always the good old xt550
(http://i118.photobucket.com/albums/o82/evo550/xt550white2.jpg)
(http://i118.photobucket.com/albums/o82/evo550/xt550yellow.jpg)

This is a good website for old thumpers

http://www.thumperpilot.com/thumpers.html
Title: Re: 4 stroke class, weapon of choice?
Post by: VMX247 on December 11, 2010, 06:59:06 pm

This is a good website for old thumpers

http://www.thumperpilot.com/thumpers.html

 :P    ...speaker on while brousing the above photos..Its a Honda or CCM running ???????????
cheers A
Title: Re: 4 stroke class, weapon of choice?
Post by: Captain Bilko on December 11, 2010, 07:39:28 pm
Old school build HL rep may even get you pre 78 class dominance
Why?
I can't see how a four stroke trail bike with a bit longer suspension is gunna flog purpose built motocross machinery of the day ???

* Unless of course you throw about twenty grand at the thing to get it going a bit better and maybe not handle like a Hippo on a roller-skate but even then it's gunna struggle against a two-banger with a dust choked air-cleaner and seized suspension...... :D
Title: Re: 4 stroke class, weapon of choice?
Post by: Graeme M on December 11, 2010, 10:08:29 pm
I think for VMX at less than Aussie Championship level it's all about the rider. If you like the HL and you can ride, you'll beat any number of guys on pure MX bikes. I can say that having watched a fast 18 year old flog an entire HEAVEN field riding a shitbox XL500 around Mt Kembla. So if an HL floats your boat, build it and race it. Who the Hell cares if it's really not as good as a Maico 490?
Title: Re: 4 stroke class, weapon of choice?
Post by: DR on December 12, 2010, 09:33:36 am
Speaking of fast younger blokes on vintage trail bikes, I and many others witnessed an XL500 '81ish silver tank job, that outwardly' didn't appear overly modified from standard, whip a KX500 and a host of 2 stroke race bikes on the dirt track :o Believe me the guy on the KX wasn't slow either it's just the bloke (Beau) on the XL was faster ;)

http://au.video.yahoo.com/watch/8660572/23459062 (http://au.video.yahoo.com/watch/8660572/23459062)
Beau and the Burmonster Coffs Classic 08

Title: Re: 4 stroke class, weapon of choice?
Post by: Nathan S on December 13, 2010, 10:13:18 pm
I think for VMX at less than Aussie Championship level it's all about the rider. If you like the HL and you can ride, you'll beat any number of guys on pure MX bikes. I can say that having watched a fast 18 year old flog an entire HEAVEN field riding a shitbox XL500 around Mt Kembla. So if an HL floats your boat, build it and race it. Who the Hell cares if it's really not as good as a Maico 490?

What are you doing? Bringing sense to the internets!? This is not how it is supposed to work!

Title: Re: 4 stroke class, weapon of choice?
Post by: Graeme M on December 13, 2010, 11:27:44 pm
Oops. Sorry, my bad...
Title: Re: 4 stroke class, weapon of choice?
Post by: 090 on December 18, 2010, 10:24:30 am
(http://i1199.photobucket.com/albums/aa474/090bvb/te510husky.jpg)

Number one on the list would have to be a 510.
A purpose built mxer/enduro bike, not a converted trail bike .
I had the pleasure of riding one and it was as close to a Maico 490 as it gets. It was super light, handled, stopped and went very well. I have also ridden a Maico with a TT500 motor in it and it was mega heavy in comparison. I liked it so much I am trolling for one atm.
Title: Re: 4 stroke class, weapon of choice?
Post by: sa63 on December 19, 2010, 07:57:13 am
http://lh5.ggpht.com/_Slmk1-PVJ-Y/TQ0faZkGh0I/AAAAAAAAAHw/qzWzwl1i79g/s288/maico%20husky.jpg  (http://lh5.ggpht.com/_Slmk1-PVJ-Y/TQ0faZkGh0I/AAAAAAAAAHw/qzWzwl1i79g/s288/maico%20husky.jpg)

How about combining the two?

Title: Re: 4 stroke class, weapon of choice?
Post by: 090 on December 19, 2010, 08:17:14 am
Hi Shaun. I saw one at Farleigh but I reckon its a waste of time and of two good bikes. The Husky does everything a Maico can. Grants' bike is a good thing, I'm still raving about it!
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on December 19, 2010, 01:34:42 pm
Number one on the list would have to be a 510.
A purpose built mxer/enduro bike, not a converted trail bike .

I agree, I have also ridden the 510 and there is no comparison with any 4 stroke of the era, it was fast, vibrated like hell, more than a touch fragile and built off a 2 stroke bottom end and chassis. No bike to compare it to until the YZ400F turned up.

I think as far as race bikes go there are guys out there who are 4 stroke only guys and run into one who knows how to use a 4 stroke to its best and they will go very fast. Big tough blokes with big bikes  ;D



Title: Re: 4 stroke class, weapon of choice?
Post by: Davey Crocket on December 19, 2010, 02:03:15 pm
Did you forget about the Husabergs marc?...ride an FC501 or FC600....might need an underwear change. ;)
Title: Re: 4 stroke class, weapon of choice?
Post by: redrider1 on December 19, 2010, 03:42:27 pm
The number 5 KLX/XR from page 4 is a nice combination.
Is that a bike that is used in OZ for VMX meetings?
Title: Re: 4 stroke class, weapon of choice?
Post by: sa63 on December 20, 2010, 07:31:43 am
(http://lh3.ggpht.com/_Slmk1-PVJ-Y/TQ5k6b_T0zI/AAAAAAAAAH0/3IuE-5oL7SQ/s640/thumpthing.JPG)

(http://lh6.ggpht.com/_Slmk1-PVJ-Y/TQ5l3vmx8GI/AAAAAAAAAH4/puM0qiSe6Ho/s400/kxlb.JPG)

(http://lh6.ggpht.com/_Slmk1-PVJ-Y/TQ5mArBVw2I/AAAAAAAAAH8/m0W2JGppmF0/s400/kxlf.JPG)

Here is  klx xl that I did after brian richards tacked togther 5 frames of  which 3 are now complete bikes. The cr tank is great looking but $$$, I used a $25 kx 80 tank

this one cost $1500 to complete, but they do have inherent problems, mostly because the 500 motor is being squeezed into a tight space.

the major problem is carby location... I never  really sorted this out and I ended up with the really long intake which is terrible for top end power, I also just used a standard carby which is far from ideal. that part of the frame needs modifying to get the carby close IMO.

Another issue is they are very front end heavy.(that big donk again..)

The ITC shocks dont work.. unless revalved and resprung .. i used standard KLX shocks with heavier springs and IT front end again with heavier springs.
 

A nice bike to ride though, but slow. Unfortunately I then rode the same 510 husky  like brad did and  i was totally blown away! So i sold this one ($1500) and got a dead (very)510, which has been the most expensive resto i have ever done but thats another story..

So the kxl was a lot of work for not much money, (Part of the fun to do it as cheap as possible!) having access to a tig and lathe is a must. The husky was easy to revive (not a lot of work) just a sh*&tload  of $$$!! talk about killing the vmx budget...

(http://lh6.ggpht.com/_Slmk1-PVJ-Y/TGyRSpoDlII/AAAAAAAAAEU/mgveplVsxmQ/s640/100_0681.JPG)

Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on December 20, 2010, 10:39:35 am
Did you forget about the Husabergs marc?...ride an FC501 or FC600....might need an underwear change. ;)

Guess I group the Bergs in as the red headed step child of the Husky 4 strokes, but you are right, fast and fragile and another step forward to where we are today. 4 stroke weapon of choice current RMZ450  ;D

(http://i245.photobucket.com/albums/gg71/marcFX_photo/SANY0101.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Graham on December 20, 2010, 10:08:00 pm
Dont under underestermate the humble TT250 2valve,a few tricks here and there a drop or two of methanol, she makes some 500's go weak at the knees,not to mention most of the smelly 2 strokes. ;D

Just wait till the 320 kit goes in,when you see the yellow side plates watch out !!
Title: Re: 4 stroke class, weapon of choice?
Post by: head on December 20, 2010, 10:17:48 pm
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD1827.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2000.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2002.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2006.jpg)
I would love a Husky TC510 or a LC4 KTM but can't find or afford one, so I am building my own take on a 4 stroke. YZ250L chassis, XR500 engine, YZ250J tank and seat. Heaps of trick bits and pieces, lots of aluminum with the goal of making it as light as possible
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on December 21, 2010, 07:48:07 am
Well done with the YZ, always thought they needed more torque. Yeah there is something very addcitive about 4 stroke special building

(http://i989.photobucket.com/albums/af11/AjayTele/General/hl500-1_1_1.jpg)

Title: Re: 4 stroke class, weapon of choice?
Post by: head on February 05, 2011, 07:44:29 pm
Getting close to paint then final assembly. Getting a decent size carby and air box has been my biggest challenge.(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2063.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2062.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2064.jpg)
Still have to rebuild a engine, I was waiting to see if it all fitted first.
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on February 05, 2011, 09:28:42 pm
I love a bike builder who ventures outside of the square. ;D Nice job Neil. 
Title: Re: 4 stroke class, weapon of choice?
Post by: head on February 06, 2011, 07:17:55 pm
Thanks Mark. Here is today's effort (http://i1139.photobucket.com/albums/n542/fastesthead/BILD2067.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2066.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2072.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2071.jpg)
And this is my exhaust, got to love my TIG welder.(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2068.jpg)(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2069.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: Davey Crocket on February 06, 2011, 07:46:01 pm
Awesome job mate....does the exhaust come out or do you have to remove the barrel?...I cant see a slip joint on the headers...or is it under the hose clamp?
Title: Re: 4 stroke class, weapon of choice?
Post by: head on February 06, 2011, 09:18:42 pm
Thanks. There is a join under hose clamp which I still have to put a slip joint. You are very observant.
Title: Re: 4 stroke class, weapon of choice?
Post by: Davey Crocket on February 06, 2011, 09:30:05 pm
You should do it for a living....nice work.
Title: Re: 4 stroke class, weapon of choice?
Post by: Barronvmx on February 06, 2011, 11:02:57 pm
Just bought a 4 stroke bike I have been searching for since 2001 or I didnt have the money when 1 was available. Its a TX 510 Husky 1983 model and is possibly the old retro racing bike of Tony's as it still has Retro racing stickers on the swingarm. If all goes well it should be a good EVO open racer as well as a great 4 stroke. If anyone has some advice on timing with a MZB ignition for this model it would be greatly appreciated. I'll keep the bike standard but may change the mufflers for weight reasons.
Title: Re: 4 stroke class, weapon of choice?
Post by: sa63 on February 07, 2011, 07:41:14 am
are you bringing it out to play at nudgee on the 20th?
Title: Re: 4 stroke class, weapon of choice?
Post by: Barronvmx on February 13, 2011, 11:02:24 pm
Yes it will have its maiden voyage on Sunday, and I have decided to keep the standard mufflers so it original. The bike has had a short test ride yesterday, I am very impressed how light it feels and the response form the torquey motor is mind blowing. Just finished going over everthing and it should be good for the practice, as long as the starting system I use works.
There is no way the DR 400, DR 500 or the XL 500 bikes I have raced or built can compare although that TT 500 in the maico frame of Brownies was very fast and Graeme's old Profab HL was very torquey.
Title: Re: 4 stroke class, weapon of choice?
Post by: crankpin on March 15, 2011, 02:49:35 am

http://www.youtube.com/watch?v=pM8gVUTwsOM&feature=player_embedded

Should be out on a shakedown this weekend  ;D
Title: Re: 4 stroke class, weapon of choice?
Post by: cappra on March 15, 2011, 06:25:43 am
What brand is that throttle?
Title: Re: 4 stroke class, weapon of choice?
Post by: crankpin on March 15, 2011, 07:27:20 am

Runs on bearings  ;) http://cgi.ebay.co.uk/GOLD-PIT-DIRT-BIKE-QUICK-ACTION-CNC-THROTTLE-GRIP-TWIST-/380295230586?pt=UK_Motorcycle_Parts&hash=item588b5cb47a don't tell anyone  8)
Title: Re: 4 stroke class, weapon of choice?
Post by: eric318 on March 15, 2011, 07:40:36 am
Status of project as of last night

(https://lh6.googleusercontent.com/_AouLVMAxNLQ/TXxWNgvXzmI/AAAAAAAASOs/aKhfsn89SsQ/s640/IMG_20110312_212453.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: mustanggrahame on March 15, 2011, 07:57:57 am
Hi Barron,
How did the TX go at Nudgee. Any pictures?
Cheers, Grahame.
Title: Re: 4 stroke class, weapon of choice?
Post by: kaw440 on March 15, 2011, 08:14:45 am
here is the one kawasaki should have built
(http://i1104.photobucket.com/albums/h337/kaw500/P3130669.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on March 15, 2011, 08:20:17 am
Quote
What brand is that throttle?
The best throttle on the market. if you look, you can get 'em in any colour you like for $20. As I've written before, some of the Chinese pitbike stuff is brilliant.
Title: Re: 4 stroke class, weapon of choice?
Post by: crankpin on March 15, 2011, 08:41:06 am
Quote
What brand is that throttle?
The best throttle on the market. if you look, you can get 'em in any colour you like for $20. As I've written before, some of the Chinese pitbike stuff is brilliant.

Yup,

Throttles, levers and chain guides are all good, only a fraction of the price ;)

Rod Spry recently purchased a Joker throttle for his own 4t Husky project and it's virtually indistinguishable from the one I'm using.
Title: Re: 4 stroke class, weapon of choice?
Post by: crankpin on March 15, 2011, 08:42:23 am

I'm liking the green thingy BTW. Is it a Huskasaki or a Kawavarna?
Title: Re: 4 stroke class, weapon of choice?
Post by: 090 on March 15, 2011, 07:47:34 pm
here is the one kawasaki should have built
(http://i1104.photobucket.com/albums/h337/kaw500/P3130669.jpg)
Looks great Simon. I'm amazed the lengths you will go to, to keep a bike green. It will look even better when it ripens ;D
Title: Re: 4 stroke class, weapon of choice?
Post by: kaw440 on March 15, 2011, 07:56:01 pm
Your turn now brad to build a trick bike for evo get off those old oil drippers and ride with some competition
Title: Re: 4 stroke class, weapon of choice?
Post by: Marc.com on March 15, 2011, 08:06:53 pm
Love the KX500, very nice job.
Title: Re: 4 stroke class, weapon of choice?
Post by: oldfart on March 15, 2011, 08:17:20 pm
Nice indeed.   
Title: Re: 4 stroke class, weapon of choice?
Post by: Slakewell on March 15, 2011, 08:54:29 pm
I love bikes like this it always shows me what I can do. Shamefully even thou I can I don't do it often enough.
Title: Re: 4 stroke class, weapon of choice?
Post by: 090 on March 15, 2011, 10:46:24 pm
Your turn now brad to build a trick bike for evo get off those old oil drippers and ride with some competition
True. The Franken bike is getting there. I can't wait till the nat's split so I can do the oil drippers and the big girls!
Title: Re: 4 stroke class, weapon of choice?
Post by: head on April 24, 2011, 03:55:20 pm
Here is my version of what Yamaha should of built. Have not ridden it yet as I am chasing a XL500s CDI box.
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2109.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2100.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2111.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2113.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2116.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2117.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2114.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2107.jpg)
(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2115.jpg)

So can anyone help me out with a CDI box please? It needs to be ridden sooner than later.
Title: Re: 4 stroke class, weapon of choice?
Post by: vandy010 on April 24, 2011, 04:49:56 pm
WOW!
thats a work of art 8)
so what do you call that thing?
Hondaha?
Yamonda?
did you do the engine fit yourself?
Title: Re: 4 stroke class, weapon of choice?
Post by: mx250 on April 24, 2011, 04:58:31 pm

(http://i1139.photobucket.com/albums/n542/fastesthead/BILD2100.jpg)

Yamaha could have sold it on looks alone 8).

I even approve of the black rims :P

Now, off you go and apply your skills and patience to the waiting 'Stang ;D.
Title: Re: 4 stroke class, weapon of choice?
Post by: head on April 24, 2011, 05:39:52 pm
Yes I fitted the motor myself. A lot of work.
The mustang is getting a 5.4 quad cam Boss motor. Nothing is ever easy for me. The left to right conversion is done and the motor and gearbox are in for a trial fit. Custom made 4 into ones are also made. Less room than the Honda / Yamaha in the Stang engine bay.
Title: Re: 4 stroke class, weapon of choice?
Post by: evo550 on April 24, 2011, 07:06:53 pm
Very nice Head, any reason you chose to fit a Honda motor instead of the standard Yamaha donk?
Title: Re: 4 stroke class, weapon of choice?
Post by: head on April 24, 2011, 08:02:25 pm
No oil tank required with the Honda, and they look a smaller motor.
Title: Re: 4 stroke class, weapon of choice?
Post by: eric318 on April 24, 2011, 11:37:26 pm
Magnificent!

Any reason why you did not choose a Honda CR chassis instead of the Yamaha yoke? :)

Tons of CDI boxes on ebay.com. That should be an easy one after all that you have done.
Title: Re: 4 stroke class, weapon of choice?
Post by: head on April 25, 2011, 07:22:05 am
Yeah, I have seen those but was hoping to get one locally. Usually a two week wait from the USA. But if I have to that is were I will get one.
Title: Re: 4 stroke class, weapon of choice?
Post by: crash n bern on April 25, 2011, 09:46:46 pm
Nothing is ever easy for me.

I can see that, I would of gone the easy route and bought a TT600.
Title: Re: 4 stroke class, weapon of choice?
Post by: firko on April 25, 2011, 10:03:48 pm
Absolutely beautiful Neil, as are all of your creations. The sign of a good special builder is the ability to make an engine swap look factory. You've really managed to achieve that with this bike. ;)
Title: Re: 4 stroke class, weapon of choice?
Post by: eric318 on April 26, 2011, 01:50:50 am
Finally...

http://www.youtube.com/watch?v=ReGdYHFSApg
Title: Re: 4 stroke class, weapon of choice?
Post by: head on April 26, 2011, 10:12:11 am
Got it going today with a CDI from a CT110 postie bike. Sounds awsome, needs some jetting changes, it is running a 38mm Dellorto and I need to get some leaner jets. It weighted in at 114.7kg ready to ride, which is a good deal lighter than a TT or XR. Need to get some time on the seat now and get it sorted.
Title: Re: 4 stroke class, weapon of choice?
Post by: NSR on May 28, 2011, 08:51:11 pm
Got any spare change :P

http://www.leboncoin.fr/motos/201608635.htm?ca=22_s (http://www.leboncoin.fr/motos/201608635.htm?ca=22_s)

(http://193.164.197.50/images/110/1105017755.jpg)
Title: Re: 4 stroke class, weapon of choice?
Post by: eric318 on May 29, 2011, 01:13:22 am
Ah yes, the famous Barigo, the "French C&J"!!! Quite a cult following in France.