BLDC motor kit to change normal tricycle into electrical tricycle. BLDC motor 750w48V, rated speed 480rpm,Rated current 21A,IP33. Insulation F. ... , with lower voltage protection (42V),with speed limit function.The kit also includingThrottle,Charger (48V)Big sprocket (29,38, 41 and ... onto the axle) 31mm dia.Brake swtich (to cut off motor's power when braking.Chain (420 or 428 optional ...