ORIGINAL: Dr Kiwi
I very much doubt you could run the stock motor on 4s - since you a stuck with the fixed size fan, you cannot "prop down" to lower amp draw, and I'm sure that you'd exceed the 9-10A limit for the motor.
Hey Dr Kiwi I didn't know you were on RCU also. I guess I am assuming you're the same Dr. Kiwi on wattflyer.
Yeah it wouldn't take much to over amp it with a 4 cell lipo if the motor limit is 10A.