Product details:

40 Amp 3 Phase charging systems provide 25 Amps at idle and 40 Amps continuously above 2800 RPM. Unique narrow rotor and stator combination fits Softail and Dyna primary cases. Voltage regulator bolts on without any frame modifications. Precision balanced vented rotor keeps the stator cooler in closed primary systems to maintain maximum output under all high current draw conditions. Large flanged seal spacer provides maximum support for the rotor and the voltage regulator output is calibrated to 14.25 volts from idle on up. Closed primary systems. Includes vented rotor. Aftermarket engine, closed primary systems Harley Davidson FLHT Electra Glide Standard 1986-1987, Harley Davidson FLHTC Electra Glide Classic 1984-1991, Harley Davidson FLHTCU Electra Glide Ultra Classic 1989-1991, Harley Davidson FLST Heritage Softail 1986-1990, Harley Davidson FLSTC Heritage Softail Classic 1988-1991, Harley Davidson FLSTF Fat Boy 1990-1991, Harley Davidson FLTC Tour Glide Classic 1984-1991, Harley Davidson FLTCU Tour Glide Ultra Classic 1989-1991, Harley Davidson FXR Super Glide II 1986-1991, Harley Davidson FXRC Low Rider Chrome 1987, Harley Davidson FXRC Low Rider Chrome 1985, Harley Davidson FXRD Sport Glide Grand Touring 1986, Harley Davidson FXRDG Disc Glide 1984, Harley Davidson FXRS Low Glide 1984-1991, Harley Davidson FXRS-Conv Low Rider Sport Convertible 1990-1991, Harley Davidson FXRS-SP Low Rider Sport 1986-1991, Harley Davidson FXRT Sport Glide 1984-1991, Harley Davidson FXST Softail Standard 1984-1990, Harley Davidson FXSTC Softail Custom 1986-1991