Binding issues

[Jamesbb0]

I have a Johnny yy250t I think with the vertical engine is that the cf moto one. Bought it thinking it was seized up wont crank over starters good. Pulled right case cover off and starter gear and starter spins freely put the gear back on without the cover and engine spins fine. When I put the cover on and tighten it down the engine goes back to not spinning but if I back the screws out a bit then it cranks fine. ???