Hey guys! I've been wanting to build one of these bikes for a pretty long time, but only recently have I had the money and bike to pursue the project (I found a nice Huffy at a yard sale for $20). Got a 66cc/80cc kit with a 415 chain for $137, with absolutely zero experience working on bicycles I had it finished within a day.. And that was after having two screws in the motor seize and strip, and having the clutch stuck on me (big thanks to BikeBerry for a walkthrough on how to fix it). Once it was all done, I drove it fine for a day until the master link popped off.. Whatever, after a day of shopping around I got another few links. But then I ran into another issue, which from a few quick looks around I see a lot of people having: The chain keeps popping off. I spent a good 4-5 hours yesterday aligning the sprocket and rear wheel (a little hard since the chain is very tight as is), before finding that putting a lot of tension on the chain was the only way to keep it on. Despite this, after a several-mile ride last night, the chain popped off again and left me to walk home carrying the seized rear wheel (sucks, I know). Hoping I can get this issue fixed soon so I can participate more actively! I have a lot of automotive experience and love modding (I have an '01 turbo Eclipse with an Evo head swap ) so this feels like an awesome outlet to have fun with without breaking the bank. Now I'm off to do some research, wish me luck!