I just finished this bike. The split drive pedal crank allows the operator to select between a pedal driven sprocket and motor driven when in motion. Seven gears can be accessed when using either power source. This bike will climb hills, blast the straights or idle through pedestrians at walking speed. All controls are stock accept for the left thumb type throttle. The split power source prevents the possibility overstressing the vehicle. When in pedal mode there is no resistance added from the motor or its drive components.