49cc 50cc 2 Stroke Racing Engine Motor, Gasoline Engine Single Cylinder Pull Rope Start Motor for Dirt Bike Pocket Bike ATV Scooters, Pocket Bike Engine Kits

So cool that this is even possible. Works great! Had fun installing it with the boys.

Had to use the old trans for my China dirtbike. Engine ran great on 32:1 on first start up! I primed the engine with oil prior to adding fuel on first start up to prevent pre mature ring failure. Engine is impressive. But now doesn’t stay running on idle. I presume I need to adjust the carb or the gas tank Was dirty prior to new engine. Either way, I will be investigating before making false claim on a poor engine build

Broke the first time using

Overall very impressed with this little motor. Showed up quicker than expected. Used it to build a small go-cart for my two boys. Fired right up on the first pull and runs great. Buyers should be aware that this is a very bare bones motor and you will need to source your own fuel tank, gas line, throttle cable, and muffler. For the price I cant complain I'm very impressed with the performance and power of this little motor. Will highly recommend to anybody in need of a small lightweight 2-stroke motor to be used with a small go-cart, mini bike, or scooter.

Fit right in the bike. Up and runs great.

The pull start is hard to pull at times as if it is getting stuck or something

Pretty good got no complaints. How do I determine the front sprocket size so I could change it to a 420 pitch? That’s the only problem I’m having anybody has some info please share.

Direct fit