brushed motor max temp

[shaunjohnson]

my new slash needed a power plant.
have a few summit batts that i could use and a XL5 ESC lying about.
went to the LHS and got me a cheap-o venom motor and broke it in properly.
melted the comm on that

so this time i did it better and went for an LRP 17x2 spec 4 motor.

it's a low better power wise and temps SO FAR are cooler.

what would you guys recommend be the max temp for a BRUSHED motor? since BL is usually 170 - <200.
i'm only running a 6 cell nimh pack and it's pretty quick.
the destructions recommend a gear ratio of 8:1 and ive got it at 13:1 (19/90 gearing) according to brianG's calc. will this increase temps?
if i move up to a 21t pinion then it's geared for 40mph (29200 rpm motor) but that's still only 11:1 final reduction.

any thoughts/tips appreciated