My 12t motor lasted threw some serious bashing. I changed it because my local hobby shop told me a nice upgrade would be a speed gem 17t. It lasted for break in on a traxxas 7cell pack, then i put in a 2s genace 30c 5300mah and burnt it up in 2 minutes. Should i not run lipos on a brushed motor. I searched many forums and found it was ok as long as i watched my run times. 2 minutes is hardly a long run time. I even stopped and placed my finger on the motor every lap i did around my yard, was it hot, yes but it didnt burn my finger off.