Motor for Blackout xte
 

Hello everyone, I wanted to see if you guys could give me any suggestions on what brushed motor I can buy for my car. I have a blackout xte (brushed version) and I want to buy a new motor because I blew 3 already. They were all the stock ones that come with the car. I upgraded the pinion gear from a 18 or 19 steel teeth to a 23 teeth brass pinion. And or if you guys can also give me an explanation as to why my motors blew that would also be helpful.