Hot motor OUCH!

[Mentat]

its brand new, i have ran 2 packs thru it. 4s1p 5000mAh and a 5s1p 4900mAh and that is it. the first pack it didnt really get to hot. the 5 cell pack is when it started heating up. I just want to know if i need to buy a new motor. I am running mamba monster 2200kv combo 48t spur, 16t pin. i want to stay around 40ish if i can, even 35 i guess. Its for my 8ight-t 1.0 race roller. Its probaly had about an hour of run time on it total, and its not like it was running non stop, i would run for a few laps, then stop for a bit to kool down. One thing for sure tho is that the engine doesnt cool off real fast. New engine or not? If so which engine would be decent? Its almost like the 2200kv motor is to much for the Truggy. Thoughts, Help!