Originally posted by sands
If you take an adjustable timing motor, and rotate the comm 180 deg, it will run backwards. with + on + and - on -.
Yes, you can. But you would make the car useless for stock motors which do not have adjustable timing. Stock is still a huge class, probably the biggest, and add 19T, which are also keyed, and it is pretty stupid to design a car that these motors cannot use. . .