Nabber

I have a 2002 Ski Doo MXZ 800 and the bolt holding the primary clutch keeps loosening itself. When i tighten it up and drive it for a few minutes, every time the bolt is loose enough that you need to tighten it up again. If you leave it, then the bolt will rattle right out. I've tried medium loctite and it didn't help at all. Could my clutch be ruined or is it something more serious? If the bushing is gone in the clutch could that be causing this? It's really frustrating because we have lots of snow and I can't ride. Please help.
Thanks