If that's after a decent run (not just a few minutes messing around) I would be happy with that. You don't want to know how hot my MM/7700 gets in my XX4. 140-160 is cold by comparison ha ha
I think I have seen temps like that (140-160) even in my B4 on a full pack, hard run.
Jammin CRT MM/Neu 1515 1700kv
Losi 8IGHT MM/Neu 1512 1900kv
Kyosho 777
T4 MM 5700
B4 LRP
XX4 MM 7700
old losi xxcr, MM4600 4s lipo 70mph+