my 01 em2 has a knocking or tapping sound at light throttle. Its loudest while it is in gear. I have recently put a zex wet kit w/ a 50 shot. but ive only put 3 bottles through it, and the noise didnt start until about 3 weeks affter the most recent bottle i used. I checked for brocken or overly-loose rocker arms, but they seem good. any ideas???

 

Anybody??? Please!!!

 

Sounds like a spun bearing, if you ask me. You might want to get a professional to look at it.

 

That's my best guess as well.