New test lightning+1930+4S 4900

[virusss]

Hallo boys today i have test my lightning, with new pack of flightpower 4S1P 4900
20C continuos 30C average and 50C burst.
The motor is 1930/8, the esc is MMax with UBEC, the gearing is 12/44.
This battery is fantastic, the punch is very strong, my runtimes is 15 minute,run on street at full trottle, and continous acceleration and brake.
The temperature on battery is 40C°, Esc 40/45C°, the problem is motor,90C°!!!
The 1930 pulls 120 ampere, 1600 watt, but seem too little for stadium truck?
I need a more torque? (1940) or my gearing is too long?
The car speed is 75/80 Kmh, wheeling at full trottle.
Plese explain me because my motor is too hot.
Thanks very much