Re: Plagued by vibrations
anything loose on the bike will increase vibration. i've tuned up a few bikes and found that the exhaust will cause alot of it. strap it down to the frame should help.
i think it's kinda weird that you say "...I've built 5 bikes with Chinese motors and had no problems until my last 3 kits..."
are you saying that 3 outta 5 have problems? those ain't good odds.