[lincpimp]

If the motor is like the smaller kb motors the front endbell should unscrew. The easiest way I can think is to mount the motor to a piece of metal with the stock mount threads and turn the can with a strap wrench. I just bought some pinions with 6mm bore from sdp-si. They are steel so they should work with palstic spurs, not sure if they would last with a steel spur though?!?!?!