Just picked up my ride, and after starting reved it a few times and the exhaust makes a whistle sound whenever I release the throttle. Bike has fmf 4.1 I believe, and power bomb header. Backfires a lot too
No programmer,....the likely cause?
good i was real nervous man....i reinstalled stock exhaust, installed 13T, and installed HID's. exhaust still sounds kinda crummy but a lot better. looked in the manual and read something about the use of low octane of gas causing the sounds, so im going to siphon the gas out tomorrow and replace it with new supreme