Originally posted by AlanC
I'm using a 128 64p kevlar spur and using between 37 - 39 tooth pinions. Using Monster stock motors on a reasonably medium to large sized track which has a large straight but not a particularly tight infield. The 128 spur seems fine but the motor can get hot on hot days.
hmm... that's pretty high for the monster stock... i use a 33/128 on a mid size track (final drive 7) maybe a tooth or 2 up if its pretty big, or has a long straight... i guess that's why your motor gets hot... over geared maybe.