Originally Posted by highvoltage

Heat is caused my many issues. The main one is gearing. To high of a gear ratio gives you tons of top end, but causes a strain on the lower end making heat. Also the same thing happens with to low of gearing, gives you tons of low end and Revs to much on the top end causing heat.

Buy yourself a temp gun and I like to keep my motors under 150 degree mark. But since you not on a track with tight turns the higher gear will not be as bad in the parking lot.

Battery size with also cause heat with the higher voltage going though them. But not as much as the wrong gearing for your driving conditions. Its hard to same what gearing is best for your driving conditions, just check the temps to be safe.