this doesnt seem to happen all the time but I would say at least half the time. Motor stutters like a stripped gear at the beginning of slow throttle. Moving the throttle faster does not have a issue, its as normal. Any ideas?

Sensor wire, Sensor board, motor timing to much, esc settings could be wrong. Some esc have an initial power setting.

Ok thanks, thats what i figured. Looked them over real quick at track but will inspect asap. Those were my initial thoughts also but also maybe a failing motor. I guess a failing motor would not work ok half the time.

also wake sure one of your 3 wires aren't soldered so there is a way for one to arc to the other and are all soldered on good