Setup: 4wd buggy, FDR 8.8, 14*3 orion chrome motor, 12-20 deg timing, red orion springs, no binding in drivetrain, motor shimmed properly.
Problem:The motor runs fine with brand new brushes but after they have been used for one run and even after being cleaned with a comm stick something really odd happens. The car will go fast for a few laps then suddenly slow down and stop. At first i though it was a hung brush but thats not the problem. When this situation occurs the brushoods get really hot and the comm gets black spots all over, these spots come off fairly easily but when i true the comm i notice that its been very heavily worn. Do you know the cause of this problem?