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Author Topic: DR 500.  (Read 2410 times)

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Curly3

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DR 500.
« on: May 30, 2011, 08:39:57 pm »
I recently tested a DR 500 engine that had been raced on Road Racing in QLD.
I scored it on ebay with no idea what had been done to it.
After stripping it down, short of splitting the cases, I found that both the balancer shafts had been removed along with the kick start shaft, complete.
The ports have been opened up a fare bit and the compression has been increased, no idea what ratio and it didn't have a carb on it so I have no idea if it had been run on Methanol.
I fitted stronger valve springs and used my standard carb with plus 10% main jet.
What a difference from a standard engine, rough down low but once it hits peak revs the vibe goes and pulls like a train.
I have to sort the jetting out but its a huge improvement.
Unfortunately the first chance I get to compare it with the pace setting big bore Yam's & Honda's will be at the DT titles in Bris next month.
I'll keep you posted.
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Offline matcho mick

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Re: DR 500.
« Reply #1 on: May 30, 2011, 10:16:15 pm »
 >:(bugger,hmmm  hang on,not pre75 8), ;D ;D, :P
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work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Curly3

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Re: DR 500.
« Reply #2 on: May 30, 2011, 10:32:22 pm »
I know it doesn't sound as exciting or exotic as a pre 75 or the Holy Grail pre 65, but I a Zook guy and I'd love to get one to give the TT/XT & XR bikes a decent run for their money.
I've got a pre65 project on the go but am relying on others to be able to move ahead.
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Offline matcho mick

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Re: DR 500.
« Reply #3 on: May 30, 2011, 11:15:35 pm »
i meant not to demean your ride slidey,i was thinking more like i wouldn't have to watch you disappear into the distance  ;D,(or at the least i'd have to do some work on my motor  ;)), :P
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work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Offline cloggy

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Re: DR 500.
« Reply #4 on: May 31, 2011, 06:06:52 am »
 One of those got 3rd in the Paris Dakar. The smallest bike and the only twinshock up there.
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Curly3

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Re: DR 500.
« Reply #5 on: May 31, 2011, 08:45:32 pm »
No offence taken Mick, how's the leg by the way?
Was that this years Dakar Cloggy and was it a class result or outright?
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Offline matcho mick

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Re: DR 500.
« Reply #6 on: May 31, 2011, 10:52:03 pm »
Quote from: SlideRulz on May 31, 2011, 08:45:32 pm
No offence taken Mick, how's the leg by the way?
Was that this years Dakar Cloggy and was it a class result or outright?
legs coming good thanks steve,calf muscles at 1/2 strength,ankles a worry,but i'm giving it a daily workout (flogging  ::))to stop it from seizing up,"physio alphabet" ;D, :P
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work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Curly3

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Re: DR 500.
« Reply #7 on: May 31, 2011, 10:56:00 pm »
Apart from the daily flogging, are you exercising the ankle??
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Offline matcho mick

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Re: DR 500.
« Reply #8 on: June 01, 2011, 05:31:47 pm »
 ;D ::) ;D, :P
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work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Offline cloggy

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Re: DR 500.
« Reply #9 on: June 03, 2011, 07:29:37 am »
1983
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Curly3

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Re: DR 500.
« Reply #10 on: June 03, 2011, 06:58:08 pm »
Doh, that was a dumb question wasn't it.
I was tired.
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Curly3

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Re: DR 500.
« Reply #11 on: June 10, 2011, 09:39:46 pm »


Who wouldn't love to throw the leg over one of these?
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