[tashpop]

since getting into the brushless scene, i've noticed on several occasions that when i'm getting unusual cogging and/or heat with a planned out system ive always had problems with my motor connections. i've also heard mamba's like to have a really solid connection to the motor's. i would try going back to you're first gearing and solder the motor direct to your new esc. another possibility is its just a bad motor. i've had one of those too, my first feigao.