[FloRiduh]

Originally Posted by DEFY

Yea, I understood the first time around though. Saying if the sprocket isn't fastened to the shaft the shaft would spin freely in the sprocket. Meaning the engine would have no way of transferring back to the rear wheel. My guess is the mechanic should have never touched the front sprocket when replacing your chain. If he had to then I would just make sure that the threads for the missing bolt are still good, if so then the bolt came loose. No reason to butt heads over a loose bolt, just use loctite on the next one.

Oh, I forgot to state that they replaced the front and rear sprockets with the chain as well. That's why they messed with the front sprocket.

Isn't it pretty serious if the sprocket came loose?