When I accelerate from a stop the clutch case physically jumps until I get going a little bit. It is NOT just a jerky clutch engagement, the actual case visibly moves.
I opened the case and the belt looks fine, dropped the skid plate and none of the mounting points looked bad, put it up on jacks and revved it in High, no movement of the clutch case.
Only happens in High. Low and Reverse gears don't cause it.
Before I pull apart the clutch itself is there anything else it could be?
2021 CanAm Maverick Trail 1000
Edit: The primary clutch won't rotate by hand, so it's likely a seized bearing in there.