[suicideneil]

What is 'it' exactly- you really do need an accurate temp gauge or IR gun, they only cost about $20 or so and are invaluable.

If its your esc that is getting how and the motor isnt, that sounds like over gearing- if the battery is upto task, it wont get hot regardless of over or under gearing to a certain degree. Lots of back and forth driving indoors will also heat the esc up quicker than normal as you arent using full throttle (escs are only efficient at 100% throttle, anything less and they will heat up more rapidly).