i have 2 master links on my drive chain. i think one of the links caught on the tensioner(yes it was on backwards) and i was doing around 35mph,so the link fell out and chain fell and caught in clutch arm cover.my tensioner has a bolt and 2 hose clamps to hold it to the frame(no it wont move or go into wheel even if you pushed on it with your hand). i went to walmart and bought a 410 chain with master link for $7 and a chain breaker with another master link for $5(i know nobody likes the chain breaker,but i wanted the extra master link and i wanted to try a chain breaker out since i usually just use a power saw to cut my chain. im going to adjust both chains and i dont know if i need the tensioner on yet. but with having longer chains i now can slide my wheel all the way back in the frame.