replacing the sensor wire on a 4.5 hv??

[pinkpanda3310]

I don't think you need a bec but the motor revs way hard on 4s. The LHS sold half a dozen or so a while back and every motor returned. Either the glue holding the magnet to the rotor melted or the plastic casing at the rear melted.

I'm not saying this will happen to you, might have been half a dozen half wits for all I know. You will need to gear it just right though because it's high kv it has a smaller range of optimum gearing.

IIRC the original esc had no braking programing, you'll need to adjust it on the EPA.

Hope this helps.