Helping a friend get a used 4 wheeler running, changed oil in crankcase and 5/16 ball bearing fell in the drain pain. Where did come from?

 

you probably pulled the wrong plug under the machine. One is the drain plug and the other has a spring and ball in it.

 

Have a 4 wheeler ran great for while.
Friend was riding it now will now go in forward?
Runs great goes in reverse fine.

I replaced the clutch belt and stuff with a kit I got on line.


Like I said run goes in reverse but will not go forward has no power?

HELP!!!!