Chain Brakes



Hi, I recently bought a 2-stroke engine from craigslist, 70 cc, and got t all running and working on a schwinn jaguar. I brought the chain to the motorcycle shop where they broke it to make it the right fit. It worked fine for the first day, but then the chain broke, twice. I have gotten 2 new master links and t just keeps breaking at the master link, I have no idea what is wrong. any ideas?