I have a 19 turn that does about 114 watts and the highest I've seen any stock motor is about 70 watts. I use amp draw to determine the condition of the brushes. Most of my stock motors when I true and put in new brushes will pull around 8.5 amps. As the brushes seat the amp draw will go up some. When the amp draw drops I will true the comm and see if the amp draw comes back. If it doesnt I will replace the brushes.