Originally Posted by crypto666
Cool thread, I almost forgot you were doing this.
My only question so far is for the shock; what is the deal with the red anodized rebound adjuster?
I am super curious what the motor mods are also.
That is going to one clean looking bike.
Hey Crypto, I really should have started this thread ages ago but rather late than never!!
The rear shock used on the original bike was a Precision Concepts hybrid of a CR500 upper and XR650R lower. Two way postage to PC in the states would have made it a very expensive choice for the build so I picked a local suspension shop that has experience building these hybrid combinations for the big XR and gave them a specific brief to not only get it as close to being the real thing, but also looking like the real thing
So the red anodized bit you mention is the 'high-speed' adjuster on the CR500 part of the shock.
The benefits of the hybrid shock are:
larger shock body with more oil, better for cooling and less fade when hot
High speed adjuster for desert racing
Slightly longer stroke, meaning a raised rear end to the bike
The original had a titanium red spring, which I could not find so David at Suspension Matters found the correct non-titanium spring for my weight and got it powder-coated that Ferrari red to match the race bike. The internals of the original are largely unknown as Bob Bell and his team kept the internal mods on the low down. I am sure Adv inmate BUMP will know more as he has had a lot of contact with the Precision Concept guys over the years the XRR was raced. I however had to choose the best parts available to me, so I went with a revalve and a race tech Gold Valve along with a total overhaul of the seals on the CR500 body.
Engine mods to follow soon