540C motors, always hot?

I run a 540C 9L motor in an MT2 and it seems that it always runs hot. After the run, the motor is really hot over 150, the esc is about 130 than the batteries are about 120.

It runs on 8 cells and 52/15 gearing at about 30-35mph. It seems like the gearing is perfect, I can hear the tires spin from rolling starts and it has enough top end to go fast.

I had the normal 9L on my 1/8th scale and it never seemed to get this hot. I ran it on the same voltage.

Does any C motor user have the same problems?