Ok.. chain came off and bunched up.. but i just kicked it into reverse and it came undone. And no cracking of the case occured. I was just wondering how I would put the chain back on the rear sprocket? do i have to take the chain off or is there some way I can leave it on and do it? Do i have to take the rear skid off? thx.

 

you have to take the chain adjustment all the way out( to make slack in chain) and then put it in.

 

Put the chain on the bottom part of the rear sprocket, and roll the bike, and the chain will roll itself onto the sprocket.