Has anyone thought of the pilot bearing in th crank. When they are worn they can take out the tob in a heart beat. Possibility that it could still be stock, only like 10 bucks to replace, but if is bad it will miss align the tob and wear it out. Hope that helps, Dagz
Im pretty sure its the cable preloading the bearing. I can hear it whinning when I am not touching the clutch. And if I just feather the clutch it will get louder.