Helllo i am a new owner of a 01 929rr and im just trying to find out what all is done to it so far i know for a fact a 2bros pipe and stretched... The question is about the chain and sprocket mainly. I know it has a RK chain and i noticed that on the rear sprocket it looks new there is a c45 on it is this a 45 tooth or something?? thanks for the help

 

The number tells you how many teeth are on the sprocket. So it should be a 45 rear sprocket.

 

when in doubt, start counting