2 stroke minneralli motorized bike engine slow take off but once gets up to 3/4 throttle it is fast ( and this is brand new motor running 20%1 mix ) after get going fast all sudden falls on it face clutch gear spinning but not drive gear locks up back tire I pull in clutch handel and once i.get down to about 5 to 10 mph release clutch and it spins fine but feels like having hard time moving often could drive sprocket be on wrong ? Idk.wth the problem is please help any ideas ?
