BLDC motor kit to change normal tricycle into electrical tricycle. BLDC motor 750w48V, rated speed 480rpm,Rated current 21A,IP33. Insulation F.With ... cooling fan.Controller 48V38A, with lower voltage protection (42V),with speed limit function.The kit also includingThrottle ... 's power when braking.Chain (420 or 428 optional) Motor kit