I've had a couple of these and still have one in the box in the cellar. I powered the other two with Kyosho Magnetic Meyhem motors. I don't believe these are still available. Another to use was the Atomic Force from the same company. Availability, again. These were $20 motors and were a significant upgrade. Now the best choice would be an outrunner brushless, unless you have access to those other motors. Why not try a "Wanted" ad.