Purchased at least 5 years ago, it failed in first year and was stored. Took it apart today and found the all plastic gears on one truck were binding. The motor pinion gear has a bent tooth which jams every revolution. The pinion is a press fit and is so loose now it can be removed my hand. Pretty sure I can fix with another 9 tooth pinion. I found a brass one on a slot car motor, but I think plastic one would be better.
Just for personal knowledge, is this a K-line drive?