I have a 2001 RK 88, in which I installed 204 cams a while back (already had the ignition and air cleaner and exhaust) but I was never really happy with the performance. The motor ran nice don't get me wrong but it just didn't seem to reach it's full potential. I tweaked and changed jets on the stock carb and yada yada yada. I finally picked up an HSR 42 Mikuni and what a difference. The torque is REALLY noticeable now. Wish I had done this a long time ago.