I'm starting to think that the problem isn't slipping in the belt, but may be the motor. Carryall told me to rejet the carb if I put an aftermarket breather on it, and haven't got around to it yet. I rode it yesterday just to start it up and tool around one more time b4 ths snow flies too much, and I think the clutch id\s working fine, but the motor is revving up and down. I'll have to dig deeper later when I get time.