Hello, i am new to the rc world and i have alot of questions.

First, please tell me why my volcano sv is overheating? I have adjusted both needles to richen it a bit, but then the performace is crap. If i tweak just a bit to the lean side, it overheats. I can only get a quater tank of gas out of the thing before it shuts down. please help

Also, Can i run a larger motor in this thing? if so what kind?

Thanx