Shenyang Limihg. Bought a chinese clone of the qt50 because it was cheap. Within 100 ft of riding it seized the crank. Bought a real qt50 engine on ebay for $10. Put the chinese cylinder it. Also lost a wrist pin clip so I took a moby clip, cut it smaller and wedged it in there. Stole a pipe off a Sting and cut the ruined baffle off. Does high 30's.