i just installed my full akro race exhaust, power commander 3 pre-mapped and 60/10/20revs enabled, and k&n filter. It sounds amazing, pulls like a bastard, but the only thing ive noticed is the little adjuster under the seat that was hooked to the stock exhaust. the motor rotation limiter or something. The kit comes with a bracket that aliminates the old peice, but now when u turn the key on it keeps vibrating against the plastic stopper, if you press it for a second it stops, but if not it keeps going. as soon as you start the bike it goes away, turn it off, it keeps vibrating. is teh setting off? or will it always do it. :banghead