I just put a R4 pipe on the KAWI and it seems to run great, sounds great. Any idea if I need to jet it?

 

pull the plug.........if it's tannish you are lean and need to go up as size or maybe two. If it's black (more than likely not) you are rich and need to get more ait in the motor. You are more than likely lean. Running lean isn't recommended. It can cause SERIOUS motor damage!!!!!

good luck

 

Yes, I agree with Cartman, and make sure you open up that airbox to get the most out of that pipe.

 

Thanks guys for ideas, I will pull the plug tonight. One more question--- How much time should I put on it before checking the plug? I just put the pipe on 2 days ago and haven't been on the bike for more than a 1/2 hour.