How does it shift? Does it jump out of gear or get false neutrals?
If so, you may have a bent shift fork.
If the fork is bent enough, it could have a gear pushed over far enough that the engagement dogs are brushing against each other.
Or your shift drum might not be rotating correctly, or something with the shift mechanism causing over or under shift drum rotation.
Last edited by SubSailor; 04-27-2009 at 04:57 PM.