Causes of hot temps

[Robert]

Someplace there was a post listing most common reasons for heat. My MM has begun to run hot lately and I'm trying to figure out why or what I can do to lower it. It seems to run fine if I run it hard. However if I'm going real slow or using the brakes it heats up. I know don't go slow or use the brakes.

When I bash with my neighbor he has alot less room so we need to go slower.
It's in a slash MM5700, 14/90, running a 3s.