i get what you mean,
but is it the rotor gets that high 200C i am not sure,
as the gap was Air, unlike Brushed Motor Which is the rotor itself is
the one had Coils and get's Heat's up.
so i think the primary reason is the coil coating melt temp's and stator,
seal. for some how deform in low Temp's Compares to Rotor's able to heat.
but i guess maintain temp's is the best under 80C at the out side to
classic check.