Your motor brand choice is most likely the cause of the heat. Buy an axi 4120 in the correct kv and stick with that. Plus your battery is only going to give so much, so a larger motor may over draw the battery. That 3200 will give a max of 96 amps, and with a lower capacity it will not do that for long. I would stick to a smaller motor, and a better built one too.
Try this motor out, I think this is what sike uses in his revo:
http://www3.towerhobbies.com/cgi-bin...?&I=LXPPX8&P=7