You can try cutting ventilation holes in your body so there's air flow.
Both esc and motor are covered under the body which can really heat things up in there if there are no holes. That's how it was for me at least.

Also check the drivetrain to see that nothing's binding.

Lastly, tighten up your slipper and see if that helps.
If your slipper is too loose, then you're applying throttle that's not actually being applied to the ground, mashing the throttle more than you really should.
Also was an issue for me as a cause for heat.