This shaft can be seen sticking out of the passenger side of the engine/transmission. The rear sprocket mounts to this shaft.

This shaft fits the non-modified Yerf Dog Spiderbox and non-modified yellow Crossfire and many 150cc scooters.  Guaranteed Fit.  Call and speak with our technician.  

The right bearings can be found by clicking here and here! Be sure to get transmission gaskets to get the job done right.

And remember to refill the gear case with 80w90 gear lube! which can be found here: