MOPED ARMY

If you already changed out both clutches, it sounds like the clutch drive assembly has fused onto the crankshaft. You will need to take it of and lap it with lapping compound. Then polish it put everything back together. The way to check it is to remove the outer drum, remove the clutches and try to spin the clutch drive assembly by hand, if it doesn't freewheel on the crankshaft, it means it's fused together. This happens when the clutches wear out and don't grab. Also, too much oil will cause this to happen.