Topic: CB750 cafe racer USD fork conversion

[lucasM]

Okay so i bought a pair of 2002 gsxr750 fork (i like the look of the silver a lot better than the gold) and i want to keep the spoke rims on the cafe racer so i bought a hub from cognito moto, the problem i am having now is with the rotors. The hub will take 2006-2007 GSX-R600, 2005-2007 GSX-R750, 2005-2010 GSX-R1000 rotors which are 310mm 5 bolt pattern. And the 2002 gsxr750 forks and calipers use a 320mm rotor. will i be able to get away with using a 310mm rotor? will there be enough contact? what are some other possibilities?

Thanks

[calj737]

First, does the 2002 rotor bolt pattern fit Devin's hub? If so, then you need to match the rotor diameter to your caliper position. If you're shorter than stock, then the caliper and pads will pinch less of the rotor. The reverse sounds to be your case though. The 320mm is dictates by caliper position. So as long as the rotor bolts ups, you should be just fine. If not, and you have to use the 310mm rotor for bolt pattern, you've got issues.

10mm is close to 1/2" and that is not a safe measurement to be off on brakes. I'd expect unpredictable braking with that scenario.