I'm puzzled

[jnev]

Usually if the electronics are cool, except for the motor, you are undergeared. With a 2000KV motor, I would think you need around a 16t pinion. It is possible that the motor shorted somehow though. I would test different gearing options in a park if possible, rather than on the track. It is much easier to monitor temps since you're not on a drivers stand. Just an idea...