My motor finaly crapped out on me. First had no spark and finaly fixed it then now it wont turn over. Everytime I let go the clutch it wont even try to start like piston is not moving. I dont know whats the current size of the motor ( it was given to me) and I want to order a new motor but not the whole kit. If I order something as in maybe an 80cc motor only will everything else bolt back on? The other problem is that my current motor is EXACT fit on my bike. If I do get a new one its has to be the same size. Does the 50cc have a big difference in size compared to the 80cc?