Originally Posted by RC demon

hey guys,
i have a EZrun 120a sc8/tenshock sc401 5200kv motor in my SSCLCG slash 4x4 and last race day before the A-main the motor stuttered and wouldent get up to speed. it would just stutter then stop. so after allot of reving it finaly stopped stuttering and got up to full speed but when i took it off throttle it would stutter again and would take a few pulls on the throttle to get it to start working again so i reved it a bit before putting it on the track and it dident stutter after that and i took first. this also happend the night before that race as soon as i turned it on, so i rebuilt the motor and cleaned it and then when i plugged it back in it worked with no stutter.

any idea's what this could be? i bench tested the motor and its fine so im guessing it has to be the esc. before i run it again i am going to re-program and re-calibrate the esc to see if that fixes it.