I just bought a new set of motors to replace a bad one.. The issue is, the pinion gear on the motor is not where it needs to be..
I need to slide the brass gear down the shaft of the new 390 motor.. There is no adjustment screw..

This is a new Taigen 390 motor with the standard pinion.. But I don't have a vice, or anything to adjust it with that I can think of..
The gear needs to go further down the shaft so it will mate with the other gear..
In short,,,,,,,,,,,, HELP I'm stuck..