[brainanator]

The stiff wires coming out of motors cannot be shortened, they are the actual windings of the motor extended out. Messing with the lengths messes with the motor. Now the motors with the floppy wires coming out are ok to shorten, the motor coils terminate in the motor itself.

Just wanted to give you some background so you can answer that question yourself in the future.
I just converted a mugen myself. Check out the tread in my signature. :) good luck with all your rigs!!