The 01 arm will fit, you'll need to use an 02 caliper and hanger, with an 04 wheel, in an 01 arm.I have a 02 R1. Im trying to use the 00 R1 swing arm. If that works then I want to know what needs to e changed for the rear. As for the front he mentioned the forks but I dont want to change the forks. I got lost on the spacer and what not as well as what needs to be done to the front to make the 04+ rim work. Also does anyone know if the 00 swing arm will work on my 02? I have a bent swing arm and a broken rear rim...
And you'll need a combination of 01 and 04 wheel spacers, but I'm not totally sure which ones, cause I got all mine mixed up and just used what fitted.
See here for more info...