How the hell did you destroy a hub? I've got an MT2, with those same rims and much more weight on them, and in all the cartwheels I've done I've never even cracked a wheel...


Also, my NT16 ran rather cold, I had trouble getting it to come up over 230 degrees most of the time. I could flog that poor little thing as hard as I wanted to and it wouldn't get any hotter, unless I leaned it out at all and then it quit smoking and shot up a bit high, 270-ish. Silly little engine it was.


As for max temp, start trying to find out why it's running hot if it keeps spiking up above 275-280. That's still safe, but only just, and dangerously close to overheating. Like I said, I had trouble getting mine to heat up over about 230.