The sound doesnt bother me, altough it gets louder the higher the rpms. i just dont know if It something serious that i should get fixed to avoid engine damage, i had my last oil change probably 300 miles ago, i take great care of it, but i do ride it hard. It only makes the sound past 12000. 12000 doesnt seem too high considering this thing redlines at 16500 and its designed for these speeds. definalty not the chain, it sounds more like its coming from the engine/exhaust. Any ideas of who can I have check this out in the columbus area that wont charge me a wack-ass price? Thanks for the replies