Medusa Afterburner V2 BL motors

Can you define really hot?

My truck was radared at 42mph but geared for 33mph FWIW. So with gearing for 37mph(about the same as my current setup) I expect it's doing into the mid to upper 40's. A quick calc say's I should be close to 47mph with my setup, and I would say it feels close to that. My motor is getting up to mid 140's which does feel quite hot to the touch, but perfectly acceptable.