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Ok, on my gen 1 conversion rear wheel do I use a busa spacer or a r1 spacer? If I use a busa spacer i have to shim the caliper. Any thoughts?

Would a r1 spacer be a better option?


OK here's some answers
Yes the R1 wheels as a set are lighter then the 1k's at one time I weighed both but for the life of me dont remember the totals.
The 04-11 R1 wheels are pretty much what you want.
There is no spacer needed for the rear wheel to work using the R1 rotor front and rear. If you are using a stock length arm you will need to shave off about 5/16 of a inch on theswing arm side of the brake hanger. If you have a longer arm theres no need.
The front R1 rotors work fine on gen1 nothing needed.
On gen2 or 1k front ends you have to use a single washer behind the rotor bolts to space it out just a bit to be perfect. I dont remember what size washer it was but nothing special. I just bought a pack from a parts store as long as the washer is big enough for the rotor bolts to go through it will work.
Using the axle from Choppaleg the wheels are a direct swap on Gen1's and only need the washers used for gen2's
 
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