[scarletboa]

i think the 1200kv would be better for 6s. that's less than 30k rpm. my 8xl (1600kv) ran 140-150F whenever i ran it with 85F ambient. that was with a stretched traxxas heatsink and the kershaw motor mount. that was on 6s with a $27 plane speed control. the hottest i temped it at was 160F after a 10 min. run with the gear mesh WAY too tight due to the motor mount shifting. it ran around 145F most of the time during my street bashing.