microsoft, the g-23 from a goped has a much larger flywheel than the airplane model which doesn't need the forced air cooling. a mount made for the plane model won't fit your engine. because the housing for the flywheel is integral with the case you might want to cut it off and use the mounting lugs on the other end of the case for the mount, the engine will be backwards but can run either direction. also the crank and bearings in these engines take a major beating when used on a scooter, even with a third bearing, you should check runout and bearing play especialy if the motor was damaged.

dave