40 Amp Charging System For Big Twin 1970-99 with closed primary

Weight: 9.77 3 phase type system produces 25 amps at idle and 40 amps above 2800 RPM. This amount of amperage provides a constant DC voltage of 14.25 from idle on up Precision balanced rotor is vented to create better oil flow to the stator that helps to reduce the temperature by 50° Large flange of the seal spacer provides additional support to the rotor without the use of a separate washer Series-type regulator-rectifier is designed to reduce unnecessary drag on the engine by unloading the stator whenever the battery reaches full charge Provides the off-idle power required for fuel injected models Compu-Fire Fits Big Twin 1970-1999 (except Twin Cam) with closed primary (oil bath type) Note: 1970-1975 models will require a 2 bolt type regulator-rectifier mount & 1970-1981 models may require slight clearancing of the primary covers