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Old 06-10-2007, 08:47 PM   #1
Udo OP
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Another R65 Dirt Bike Project

After much reading of posts and questions to all on this forum I've finally accumulated enough parts to start the new R65 based dirt bike. Sort of a baby GS? The frame is an early 80's R65LS, forks, front wheel, caliper/rotor off a 90 Honda CR500, motor '82 R65LS, transmission '84 R100, swing arm might be a late 70's /7, but I,m not sure. The rear wheel is a /7. Handle bars are Renthal tapered and will carry late 70's BMW controls and switches. Rear shocks are 17 1/2" Progressive that were almost impossible to find.
Thought I'd share pics and description as this comes along. A pleasant surprise was to discover that the Honda and BMW share the same size steering head bearings. A 1/2" long spacer and they bolted together.
Helpful suggestions and ideas will be welcome.
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Old 06-10-2007, 08:57 PM   #2
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sounds like a terrific start. Will you do any frame reinforcement?

Thats really convenient, about the steering head.

gonna be street legal? lights, etc?

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Old 06-10-2007, 09:07 PM   #3
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Yes on the frame reinforcement. This week I'll make and weld extra brackets at the top shock mounts, and some beefing at the steering head. I think that the Acerbis style headlamps would be the easiest for a start. Last week I received an R65 fuel tank that will have to do for awhile, till I find a GS tank. Seating hasn't been figured out yet.
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Old 06-10-2007, 09:14 PM   #4
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yeah, subframe was my next question, but it seemed early.

how bout exhaust?
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Old 06-10-2007, 09:20 PM   #5
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Exhaust? Don't need no stinking exhaust. Have given it some thought. Somewhere I should have the system I took off my old R65LS when I converted it to an R80. Larger pipes. A friend knows someone down in Boulder who builds custom bike exhaust systems. I thought I'd be able to put the two together and come up with a solution.
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Old 06-10-2007, 09:25 PM   #6
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full speed ahead!



Looking forward to its first wheelie pic.
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Old 06-10-2007, 09:48 PM   #7
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Quote:
Originally Posted by Udo
Somewhere I should have the system I took off my old R65LS when I converted it to an R80. Larger pipes. A friend knows someone down in Boulder who builds custom bike exhaust systems. Helpful suggestions and ideas will be welcome.
The bigger the header diameter ,the less bottom end ,all else being equal .
I'm digging the pic
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