Originally posted by proudcanadian
but as for the problem with the 20x1 i have to give the car a push to get it moving and it has little speed
i know the brushes are getting low could this be the problem?
Yeah, you're most likely "hanging a brush."
Just pick up some new brushes or even better, have your local hobby shop (or someone you know who has a comm. lathe) cut the comm. for you and then put in the new brushes and you should be fine.