cutting flatspot help.....

[maxxdude1234]

Just got back from a run. The temps outside are about 30degrees celcius....so hot. After no more than 4-5minutes running the motor was very very hot. I couldn't keep my hand on it for longer than 3 seconds. I noticed that one tooth had been stripped off the spur gear. Could this have caused the motor to overheat, or is it likely due to the high outdoor temps. I have it geared 16/72 on a 10lb-ish maxx, is this geared to high? Or is it quite normal for brushless motors to have much higher temps than brushed motors?

Gonna try again later with 15/72, and the outdoor temps should have dropped by then - 24degrees ish.

Thanks