i have a really bad rattle sound on decel once its warmed up sounds like its coming from where the header mets the head but i nut and bolted the whole thing everything is tight header doesnt appear to have any cracks anywhere or any exhaust leakin around there figured if i found someone familar with these bikes they would have a better idea than me what it is also prob needs a tps reset cuz sometimes it will hang up at 2 grand and wont idle down