Ok can someone shed some light please. I had a new 4.5 x12 geared at 8.4.(on road med to large track) Ran it about 6 times at our state title race and in the finals the rear bearing blew apart. So i stripped it down cleaned out all the debris as best as possible and ran it in the next run. I got to the end of the run and it just stopped. A motor wire unsoldered. This tells me it got pretty hot. Is the motor stuffed? The rotor has a few scratches on it too.
Cheers
I run my 4.5 at 9.0fdr, 150f after every run
they do like to eat bearings unless you lube alot