Help my clutch won't engage.

[colonelkrs]

I just bought a new motor for my stretch cruiser. It lasted a week. Went far to see a friend and before I got there my bike just went neutral. Upon checking I saw that the nut that holds the sprocket for the motor side chain was off. I tightened it back and it worked for half a block. Now I keep getting worse results. I think the cam may be stripped or something but the nut goes back on so I'm not sure if that's the problem. And I have no clue how to make it work. Please help.

 

[crassius]

when it came loose, the woodruff key fell out - when installing a chain, always feed chain in from bottom so as not to loosen the nut on that sprocket

 

[colonelkrs]

when it came loose, the woodruff key fell out - when installing a chain, always feed chain in from bottom so as not to loosen the nut on that sprocket

Yup woodruff key.
Had to change the whole clutch shaft too bc threads were stripped where the sprocket nut goes.