My friend went from a 27t to a 21t in his drifter and it cut his run time in half... Also the motor gets so hot you can't touch it... Not sure what brand it is. Its like a neon pink color. Any ideas why this happens?
If he's using the same exact pinion, that's why. The motor could be drastically overgeared. Tell him to install a pinion that is about 4-5 teeth smaller. That should get him in the ballpark, and increase his runtimes a bit.