I started to heard weird clanking sound from the clutch area that seems random. I decided to open it up and check and I found that the small bevel gear screw came off and was grinding away the clutch cover. The bike still rides fine, but is it safe to continue riding without that screw? Will the gear come off eventually? The screw looks weird and nothing like the one pictured on pistonbikes. It won't even go back in anymore. I guess it got messed up from the gear spinning. I assume I need parts number #3 and #4 from the diagram found at pistonbikes:
Crankcase
Crankcase
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