death motor!!!!or not??

[e-mike]

i run today my e-maxx and after 10min of hard acceleration and braking in the street,,,the truck look like loose brake...or something else..and the motor start to cogging...i check with my gun temp and the motor was 290F(feigao 6xl)my esc (mmm)90f and the pack(lipo maxamp 8000hv 7,4x2) 101f......no power come out of the motor and no brake.....it is burn????i try another motor and no issue at all and the esc run flawlessly....i was scared i was tinking that my mmm was died