[jhautz]

your never going to make any mamba max motor run well in a revo. Way to small of a motor. A motor that size is intended for a RC10 or 1/10 touring car. Especially that high of a KV. the 4200 may have a chance for a couple minutes before fying, but the 7700 hasnt got a shot in hell. Get yourself a Feiago 9XL motor and you will be OK. I would recomend a 8xl for a little more speed, but I think the 3700 batteries may be a little on the small side to handle the load. Your better off on the safe side and going with a 9xl to draw less current.