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Author Topic: DR 500  (Read 11559 times)

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Offline Barronvmx

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DR 500
« on: August 19, 2007, 09:17:23 pm »
I am about to make a DRM 500 just like the DRM 400 I made which is on this site under features but I require some parts to do so.
Does anyone have an RM 125 A or B tank, Rm 125 seat A, B or C.  TM tank may fit but they are probably pretty rare. I am located in Brissy.
Thanks
Glenn
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Huskies
CR250 1972, CR400 1972, SC125 1973, CR250 1975GP, WR250 1979/80, XC125 1983, TX510 1983, XC125 1984 project, CR250 1984 project
Honda's
SL100 1971, XL100 1974, Hondasaki 210, XL185 1981 project
Jawa's
1959 250 project, 1969 175 trail boss project.
Sachs 1969 125

Offline cyclegod

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Re: DR 500
« Reply #1 on: August 19, 2007, 10:57:03 pm »
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oldfart

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Re: DR 500
« Reply #2 on: August 20, 2007, 04:20:47 pm »
Glenn
         Since I spoke to you last at Tamborine I have the DRM 400 about 90% complete Plus a DRM 500 awaiting time to finish off .
The DR 500 is a lot wider on the top frame rails than the DR 400 ....the Rm 125 seat is approx 15mm too narrow ....the tanks no problem with a few mods  ;)
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Offline brent j

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Re: DR 500
« Reply #3 on: August 20, 2007, 10:20:17 pm »
It's a bit out of your way but D&R motorcycles (I'm sure that's right) in Roma had an aluminium RM tank hanging up in their back shed when I came back from Conondale last year.

You never know

Brent
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DR Fan

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Re: DR 500
« Reply #4 on: August 22, 2007, 08:52:18 am »
Pleased to find out im not the only one with the DR disease, I have a DRM 500 also witch has 38mm RM250x front end,RM400n/t swingarm and rear wheel, Foxair shocks.
Motor apart from 38mm round slide mikuni is standard.
Tank,seat etc is next any hints welcome.
Will try to put some photos up soon, any info would be good.
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oldfart

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Re: DR 500
« Reply #5 on: August 22, 2007, 05:51:16 pm »
 They way a Ton and a half,  pull like a teenager and are dirt cheap to buy .
I have about 6 of em 81 thru to 83
Up in sunny Queensland there's one kicking around at most of the VMX meet's He tells me he has disconnected the balance chain and it revs harder and vibrates stuff all 
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Doc

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Re: DR 500
« Reply #6 on: August 22, 2007, 06:57:33 pm »
hmmmm..disconnected the balance chain and it runs harder eh. Now oldfart, I did have thoughts of that when I owned my DR thinking along the same lines of less intertia = better response. Alas the mighty DR is up at bro's place now but I have often pondered  those very same thoughts for the TSX250 balancer shaft..as Sixto Rodriguez sang, I wonder..wonder I do  :-\
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DR Fan

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Re: DR 500
« Reply #7 on: August 22, 2007, 07:05:30 pm »
Photos of a small part of my DR collection, 250Z is raced in a class we call EVO Lites in our NZ VMX series
500 has to race with open class 2 strokes, as you can see needs a tidy up.

[attachment deleted by admin]
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Offline Barronvmx

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Re: DR 500
« Reply #8 on: August 22, 2007, 10:03:00 pm »
Well I didn't expect such interest but then again when I made the DRM 400 about 4 years ago I was receiving Emails world wide on what to use to make it a competitive VMX DR.
The removeale of counter balances does increase responsive rev's as I did this to an XL500. apparently as someone noted they don't vibrate like my XL did although it was great at get rid of mud stuck to the bike.
On the DRM 400 after months of testing I came up with the following.
RM 250 C swingarm
RM 125B tank
RM 125 B side covers
RM 125 C seat
Mikuni 34 mm with jets to HL500 specs or close to it
An alloy muffler
and PE 175 front end because I had it.
I hope to do the same conversion but didn't realize the frame was wider so I'll have to re think the RM seat.
The 400 motor was standard and that was the let down, the 500 flies and it should handle after the suspension upgrade. I just installed the longer DR forks and S&W shocks.
Apparently I came over the step up at the Conondale Classic and nearly bounced off the bike when I landed.
The bike looks dog ugly so if anyone can help please send me a message.
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Huskies
CR250 1972, CR400 1972, SC125 1973, CR250 1975GP, WR250 1979/80, XC125 1983, TX510 1983, XC125 1984 project, CR250 1984 project
Honda's
SL100 1971, XL100 1974, Hondasaki 210, XL185 1981 project
Jawa's
1959 250 project, 1969 175 trail boss project.
Sachs 1969 125

DR Fan

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Re: DR 500
« Reply #9 on: August 23, 2007, 07:59:16 am »
Have done the counter balancer trick, but only removed the chain so they still in there, will chuck them out when i do motor rebuild,makes quite a difference.
Does anyone know if these motors where used in flat trackers in the US?
Recieved some info from helpful people on the old forum that XR500 piston 79/82 is the piston to use, as has same size pin and deck height and can get wiseco Hi Comp, plus std XR is all ready 1mm o/s from DR so big bore options aplenty.
If anyone would like to share any info, I would like to listen and learn.
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oldfart

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Re: DR 500
« Reply #10 on: August 23, 2007, 06:12:11 pm »
Where do you want me to start .Shit loads of spare"s ferrited over the years.
I would post a pic of me creations, but apparently they don't post too well
DR 400  MODIFIED
DR 500  MODIFIED
Heard of the honda piston swap but know of anyone that has tried it , so I have gone in the other direction and have pressed the 500 sleeve out and will be replaced with the 600  ; the paddle has been removed along with the gears and chain  ( proto type )                 
         
                 
                 
               
                 
                             












« Last Edit: August 23, 2007, 06:19:44 pm by oldfart »
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Offline Graeme M

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Re: DR 500
« Reply #11 on: August 23, 2007, 07:31:37 pm »
Hey Barron, I had a DR500 in about 82/83 (and one of the first competition only DR250s in Qld). I also had a 370 before that. The 500 had a far better motor, revved out great and plenty of power but never the same hit off the bottom as the TT500. But I didn't much like it in the bush, heavy and lousy suspension. But set up with good suspension and all the heavy road gear off it and it should be very nice.  If I get up there next year I'll be begging for a ride!

Here's a pic of the mighty DRM400:

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Offline brent j

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Re: DR 500
« Reply #12 on: August 23, 2007, 08:59:09 pm »
DR fan,
I'm not sure if I answered one of your posts in the past or not but get in touch with Darryl at Darryl August motorcycles in Taupo. I rode his bike a few years ago when I visited and it's a nice ride.
I still owe the guy a big thank you

Brent
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Offline DJRacing

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Re: DR 500
« Reply #13 on: August 24, 2007, 07:36:10 am »
I remember the day Brent. Darryl still punts it around and is still as fast as ever ;D
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Offline Barronvmx

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Re: DR 500
« Reply #14 on: August 26, 2007, 12:30:13 am »
Why did I ever sell that bike, it looks great in the picture.
So you had a DR250, how was that to ride and what modifications did you do to it.
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Huskies
CR250 1972, CR400 1972, SC125 1973, CR250 1975GP, WR250 1979/80, XC125 1983, TX510 1983, XC125 1984 project, CR250 1984 project
Honda's
SL100 1971, XL100 1974, Hondasaki 210, XL185 1981 project
Jawa's
1959 250 project, 1969 175 trail boss project.
Sachs 1969 125
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