ok i have the 1/16 mini e-revo that is brushless and im running two 11.1v 1300mah li-power lipos and it would just instantly flip over on its back when you gave it throttle. last week the servo went bad so i replaced it and now with both lipos at full charge it has hardly any power. any sugestions?

You may have burned out the motor. Do you hear any clicking on acceleration? Is something binding in the drive train?