SUPER73 RX Power

Motor Controller (R-Series)

The motor controller is responsible for three-phase DC-to-AC conversion to drive the hub motor. If the internal MOSFETs or logic board fail, the controller cannot properly time the electrical pulses to the motor, resulting in an audible 'clicking' or 'stuttering' sound as the motor fails to achieve synchronization, followed by a complete loss of driving power.

Internal Nylon Planetary Gear Set

The RX utilizes a geared hub motor where internal nylon gears transfer torque from the motor's rotor to the wheel hub. If these gear teeth strip due to high torque or thermal fatigue, the motor will spin freely inside the hub, creating a mechanical clicking or grinding sound while failing to provide any actual propulsion to the vehicle.

Brake Cut-off Sensor

The Super73 system includes sensors on the brake levers that immediately kill power to the motor when engaged. If the adjustment screw is too tight or the sensor is faulty, it can intermittently trigger the 'kill' signal, often accompanied by a clicking sound from the controller's internal relay or the rapid cutting in-and-out of the motor's phase power.