Please help

[Brevinso13]

Can some one help me I have a motor bike kit thing for a bike ok and I have everything put on thair right it’s just when ever I’m Peedling the motor locks up but if I roll the bike back it will free up and I can ride it again but it’ll do the same thing

 

[Venice Motor Bikes]

chain too loose?

 

[Larry Trotter]

Probably chain alignment. The chain jumps a tooth on the motor end and stacks up inside the housing locking the wheel.

 

[curtisfox]

I go with both to lose and out of alignment............. Curt

 

[Oldbiscuit]

Another thing to look at is your chain tensioner. Where do you have it located ? On the bottom (return side) or the top (drive side). ? It has to be on the bottom return side.