Hey wats going on. Names Ryan new to the site. I have a bike and im not sure of what it is. I kno its a 49cc. I got it from my girlfriends dad. He use to ride it around the drag strip. Said that it needed a little bit of carb work. So i said screw bought a new carb for it put it on. And it still dont run. It has a problem when trying to start. The pull start wont rotate. I took it off and when not on the engine it pulls just fine. So im almost thinking that the engine is ceased up. Any thoughts on what it could be? Pls let me know thanks.