Thermal cut off on my speedo/motor is (IIRC) 95 degrees C. (Thats a speed passion ESC and Thunderpower 8.5T motor)
And brushless motors will run almost indefinitely at 80-85 degrees C.
The brushless motors we buy at work (fairly similar spec to rc car motors) quote a ~6000 hour life at 80 and ~15000 at 60 IIRC, if run at steady speeds, all the up and down and running to max speed on a RC car will knock this down a fair bit, probably less than half, but try and work out how long it'll take you to run your car for 3000 hours, even if you are bashing for 2 hours a day, 7 days a week it'll take you the best part of 9 months before performance drops off noticeably. (Especially if you are only bashing, racers might notice sooner.)
Might be worth getting an IR temp gun to check how hot it actually is. Touching a motor at well below the max continuous will give you the beginnings of a burn.
And again, why bash a B44.2? It's a race car, with race set ups, and needs race car levels of service and attention?
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