My question is about TT02 Brushed Gearing. A few of us locally settled on TT02 Brushed Motor racing. Running Sport Tuned motors. I had 68/25 .6Mod gearing. I was not happy with the speed, so i bought a 64 spur with 27 and 29 pinions to try. The motor i have is only a month old with a dozen runs on it. I was running 68/25 just fine with no issues. Last night i tried the 64/27 and after a few short runs my motor died. Is that gearing too aggressive for a sport tuned motor? What would you do? reducing gearing ( perhaps 64/25)? or add a heatsink and fan?

As additional info we run run 3 minute races with a minute break in between. We'll run for about an hour at night and use 2 battery packs ( 5000mah). Finally last night after the car stopped working, i felt the motor and it didn't seem too hot. I wonder if it was jus excessive debris that killed my motor. Lots of dust and pollen out during spring.

What would you do?