COMPUFIRE 55570 Charging System, 40 Amp Non-Vented, 1981–1999 BT/EVO

The COMPUFIRE 55570 Charging System is designed to provide high-output charging performance for select Harley-Davidson motorcycles. This system produces 25 amps at idle and reaches 40 amps above 2,800 rpm, supporting consistent electrical output across a broad engine-speed range.

The rotor and stator feature a narrow profile for fitment with the OEM primary on Softail, Dyna and FLT applications. A vented rotor helps dissipate heat and keeps the stator cooler, allowing the charging system to maintain maximum output. The high-output voltage regulator provides 14.25 volts from idle.

Made in the USA, the COMPUFIRE 55570 Charging System fits the Harley-Davidson applications listed for this part, including select 1984–1999 FLHTC Electra Glide Classic and 1994–1999 FLHR Road King models. Verify vehicle application details before installation.

Features:

• Output: Produces 25 amps at idle and 40 amps above 2,800 rpm
• Application Design: Narrow-profile rotor and stator fit with the OEM primary on Softail, Dyna and FLT applications
• Heat Dissipation: Vented rotor helps keep the stator cooler for maximum output
• Voltage Regulation: High-output regulator provides 14.25 volts from idle
• Manufacturing: Made in the USA

Fitment:
Harley Davidson FLH Electra Glide 1984
Harley Davidson FLH Electra Glide 1985
Harley Davidson FLHR Road King 1994
Harley Davidson FLHR Road King 1995
Harley Davidson FLHR Road King 1996
Harley Davidson FLHR Road King 1997
Harley Davidson FLHR Road King 1998
Harley Davidson FLHR Road King 1999
Harley Davidson FLHRC Road King Classic 1998
Harley Davidson FLHRC Road King Classic 1999
Harley Davidson FLHS Electra Glide Sport 1984
Harley Davidson FLHS Electra Glide Sport 1987
Harley Davidson FLHS Electra Glide Sport 1988
Harley Davidson FLHS Electra Glide Sport 1989
Harley Davidson FLHS Electra Glide Sport 1990
Harley Davidson FLHS Electra Glide Sport 1991
Harley Davidson FLHS Electra Glide Sport 1992
Harley Davidson FLHS Electra Glide Sport 1993
Harley Davidson FLHT Electra Glide 1986
Harley Davidson FLHT Electra Glide 1987
Harley Davidson FLHT Electra Glide 1995
Harley Davidson FLHT Electra Glide 1996
Harley Davidson FLHT Electra Glide 1997
Harley Davidson FLHT Electra Glide 1998
Harley Davidson FLHT Electra Glide 1999
Harley Davidson FLHTC Electra Glide Classic 1984
Harley Davidson FLHTC Electra Glide Classic 1985
Harley Davidson FLHTC Electra Glide Classic 1986
Harley Davidson FLHTC Electra Glide Classic 1987
Harley Davidson FLHTC Electra Glide Classic 1988
Harley Davidson FLHTC Electra Glide Classic 1989
Harley Davidson FLHTC Electra Glide Classic 1990
Harley Davidson FLHTC Electra Glide Classic 1991
Harley Davidson FLHTC Electra Glide Classic 1992
Harley Davidson FLHTC Electra Glide Classic 1993
Harley Davidson FLHTC Electra Glide Classic 1994
Harley Davidson FLHTC Electra Glide Classic 1995
Harley Davidson FLHTC Electra Glide Classic 1996
Harley Davidson FLHTC Electra Glide Classic 1997
Harley Davidson FLHTC Electra Glide Classic 1998
Harley Davidson FLHTC Electra Glide Classic 1999
Harley Davidson FLHTCU Electra Glide Ultra Classic 1989
Harley Davidson FLHTCU Electra Glide Ultra Classic 1990
Harley Davidson FLHTCU Electra Glide Ultra Classic 1991
Harley Davidson FLHTCU Electra Glide Ultra Classic 1992
Harley Davidson FLHTCU Electra Glide Ultra Classic 1993
Harley Davidson FLHTCU Electra Glide Ultra Classic 1994
Harley Davidson FLHTCU Electra Glide Ultra Classic 1995
Harley Davidson FLHTCU Electra Glide Ultra Classic 1996
Harley Davidson FLHTCU Electra Glide Ultra Classic 1997
Harley Davidson FLHTCU Electra Glide Ultra Classic 1998
Harley Davidson FLHTCU Electra Glide Ultra Classic 1999
Harley Davidson FLHX Electra Glide Special 1984
Harley Davidson FLHX Electra Glide Special 1985
Harley Davidson FLST Softail Heritage 1986
Harley Davidson FLST Softail Heritage 1987
Harley Davidson FLST Softail Heritage 1988
Harley Davidson FLST Softail Heritage 1989
Harley Davidson FLST Softail Heritage 1990
Harley Davidson FLSTC Softail Heritage Classic 1988
Harley Davidson FLSTC Softail Heritage Classic 1989
Harley Davidson FLSTC Softail Heritage Classic 1990
Harley Davidson FLSTC Softail Heritage Classic 1991
Harley Davidson FLSTC Softail Heritage Classic 1992
Harley Davidson FLSTC Softail Heritage Classic 1993
Harley Davidson FLSTC Softail Heritage Classic 1994
Harley Davidson FLSTC Softail Heritage Classic 1995
Harley Davidson FLSTC Softail Heritage Classic 1996
Harley Davidson FLSTC Softail Heritage Classic 1997
Harley Davidson FLSTC Softail Heritage Classic 1998
Harley Davidson FLSTC Softail Heritage Classic 1999
Harley Davidson FLSTF Softail Fat Boy 1990
Harley Davidson FLSTF Softail Fat Boy 1991
Harley Davidson FLSTF Softail Fat Boy 1992
Harley Davidson FLSTF Softail Fat Boy 1993
Harley Davidson FLSTF Softail Fat Boy 1994
Harley Davidson FLSTF Softail Fat Boy 1995
Harley Davidson FLSTF Softail Fat Boy 1996
Harley Davidson FLSTF Softail Fat Boy 1997
Harley Davidson FLSTF Softail Fat Boy 1998
Harley Davidson FLSTF Softail Fat Boy 1999
Harley Davidson FLSTN Softail Heritage Special 1996
Harley Davidson FLSTN Softail Nostalgia 1993
Harley Davidson FLSTN Softail Nostalgia 1994
Harley Davidson FLSTN Softail Nostalgia 1995
Harley Davidson FLSTS Softail Heritage Springer 1997
Harley Davidson FLSTS Softail Heritage Springer 1998
Harley Davidson FLSTS Softail Heritage Springer 1999
Harley Davidson FLTC Tour Glide Classic 1984
Harley Davidson FLTC Tour Glide Classic 1985
Harley Davidson FLTC Tour Glide Classic 1986
Harley Davidson FLTC Tour Glide Classic 1987
Harley Davidson FLTC Tour Glide Classic 1988
Harley Davidson FLTC Tour Glide Classic 1989
Harley Davidson FLTC Tour Glide Classic 1990
Harley Davidson FLTC Tour Glide Classic 1991
Harley Davidson FLTC Tour Glide Classic 1992
Harley Davidson FLTC Tour Glide Classic 1993
Harley Davidson FLTCU Ultra Classic Tour Glide 1989
Harley Davidson FLTCU Ultra Classic Tour Glide 1990
Harley Davidson FLTCU Ultra Classic Tour Glide 1991
Harley Davidson FLTCU Ultra Classic Tour Glide 1992
Harley Davidson FLTCU Ultra Classic Tour Glide 1993
Harley Davidson FLTCU Ultra Classic Tour Glide 1994
Harley Davidson FLTCU Ultra Classic Tour Glide 1995
Harley Davidson FLTCU Ultra Classic Tour Glide 1996
Harley Davidson FLTR Road Glide 1998
Harley Davidson FLTR Road Glide 1999
Harley Davidson FXD Dyna Super Glide 1995
Harley Davidson FXD Dyna Super Glide 1996
Harley Davidson FXD Dyna Super Glide 1997
Harley Davidson FXD Dyna Super Glide 1998
Harley Davidson FXD Dyna Super Glide 1999
Harley Davidson FXDB-D Dyna Glide Daytona 1992
Harley Davidson FXDB-S Dyna Glide Sturgis 1991
Harley Davidson FXDC Dyna Super Glide Custom 1992
Harley Davidson FXDL Dyna Low Rider 1993
Harley Davidson FXDL Dyna Low Rider 1994
Harley Davidson FXDL Dyna Low Rider 1995
Harley Davidson FXDL Dyna Low Rider 1996
Harley Davidson FXDL Dyna Low Rider 1997
Harley Davidson FXDL Dyna Low Rider 1998
Harley Davidson FXDL Dyna Low Rider 1999
Harley Davidson FXDS-Conv Dyna Convertible 1994
Harley Davidson FXDS-Conv Dyna Convertible 1995
Harley Davidson FXDS-Conv Dyna Convertible 1996
Harley Davidson FXDS-Conv Dyna Convertible 1997
Harley Davidson FXDS-Conv Dyna Convertible 1998
Harley Davidson FXDS-Conv Dyna Convertible 1999
Harley Davidson FXDWG Dyna Wide Glide 1993
Harley Davidson FXDWG Dyna Wide Glide 1994
Harley Davidson FXDWG Dyna Wide Glide 1995
Harley Davidson FXDWG Dyna Wide Glide 1996
Harley Davidson FXDWG Dyna Wide Glide 1997
Harley Davidson FXDWG Dyna Wide Glide 1998
Harley Davidson FXDWG Dyna Wide Glide 1999
Harley Davidson FXDX Dyna Super Glide Sport 1999
Harley Davidson FXE Super Glide 1984
Harley Davidson FXEF Fat Bob 1985
Harley Davidson FXLR Low Rider Custom 1987
Harley Davidson FXLR Low Rider Custom 1988
Harley Davidson FXLR Low Rider Custom 1989
Harley Davidson FXLR Low Rider Custom 1990
Harley Davidson FXLR Low Rider Custom 1991
Harley Davidson FXLR Low Rider Custom 1992
Harley Davidson FXLR Low Rider Custom 1993
Harley Davidson FXLR Low Rider Custom 1994
Harley Davidson FXR Super Glide 1986
Harley Davidson FXR Super Glide 1987
Harley Davidson FXR Super Glide 1988
Harley Davidson FXR Super Glide 1989
Harley Davidson FXR Super Glide 1990
Harley Davidson FXR Super Glide 1991
Harley Davidson FXR Super Glide 1992
Harley Davidson FXR Super Glide 1993
Harley Davidson FXR Super Glide 1994
Harley Davidson FXRC Low Glide 1985
Harley Davidson FXRC Low Rider Chrome 1987
Harley Davidson FXRD Grand Touring 1986
Harley Davidson FXRDG Disc Glide 1984
Harley Davidson FXRS Low Glide 1984
Harley Davidson FXRS Low Glide 1985
Harley Davidson FXRS Low Glide 1987
Harley Davidson FXRS Low Glide 1988
Harley Davidson FXRS Low Glide 1989
Harley Davidson FXRS Low Glide 1990
Harley Davidson FXRS Low Glide 1991
Harley Davidson FXRS Low Glide 1992
Harley Davidson FXRS Low Rider 1986
Harley Davidson FXRS-Conv Low Rider Convertible 1990
Harley Davidson FXRS-Conv Low Rider Convertible 1991
Harley Davidson FXRS-Conv Low Rider Convertible 1992
Harley Davidson FXRS-Conv Low Rider Convertible 1993
Harley Davidson FXRS-SP Low Rider Sport 1986
Harley Davidson FXRS-SP Low Rider Sport 1987
Harley Davidson FXRS-SP Low Rider Sport 1988
Harley Davidson FXRS-SP Low Rider Sport 1989
Harley Davidson FXRS-SP Low Rider Sport 1990
Harley Davidson FXRS-SP Low Rider Sport 1991
Harley Davidson FXRS-SP Low Rider Sport 1992
Harley Davidson FXRS-SP Low Rider Sport 1993
Harley Davidson FXRSE CVO FXR 1999
Harley Davidson FXRT Sport Glide 1984
Harley Davidson FXRT Sport Glide 1985
Harley Davidson FXRT Sport Glide 1986
Harley Davidson FXRT Sport Glide 1987
Harley Davidson FXRT Sport Glide 1988
Harley Davidson FXRT Sport Glide 1989
Harley Davidson FXRT Sport Glide 1990
Harley Davidson FXRT Sport Glide 1991
Harley Davidson FXRT Sport Glide 1992
Harley Davidson FXSB Low Rider - Belt 1984
Harley Davidson FXSB Low Rider - Belt 1985
Harley Davidson FXST Softail 1984
Harley Davidson FXST Softail 1985
Harley Davidson FXST Softail 1986
Harley Davidson FXST Softail 1987
Harley Davidson FXST Softail 1988
Harley Davidson FXST Softail 1989
Harley Davidson FXST Softail 1990
Harley Davidson FXST Softail 1999
Harley Davidson FXSTB Softail Night Train 1999
Harley Davidson FXSTC Softail Custom 1986
Harley Davidson FXSTC Softail Custom 1987
Harley Davidson FXSTC Softail Custom 1988
Harley Davidson FXSTC Softail Custom 1989
Harley Davidson FXSTC Softail Custom 1990
Harley Davidson FXSTC Softail Custom 1991
Harley Davidson FXSTC Softail Custom 1992
Harley Davidson FXSTC Softail Custom 1993
Harley Davidson FXSTC Softail Custom 1994
Harley Davidson FXSTC Softail Custom 1995
Harley Davidson FXSTC Softail Custom 1996
Harley Davidson FXSTC Softail Custom 1997
Harley Davidson FXSTC Softail Custom 1998
Harley Davidson FXSTC Softail Custom 1999
Harley Davidson FXSTS Softail Springer 1988
Harley Davidson FXSTS Softail Springer 1989
Harley Davidson FXSTS Softail Springer 1990
Harley Davidson FXSTS Softail Springer 1991
Harley Davidson FXSTS Softail Springer 1992
Harley Davidson FXSTS Softail Springer 1993
Harley Davidson FXSTS Softail Springer 1994
Harley Davidson FXSTS Softail Springer 1995
Harley Davidson FXSTS Softail Springer 1996
Harley Davidson FXSTS Softail Springer 1997
Harley Davidson FXSTS Softail Springer 1998
Harley Davidson FXSTS Softail Springer 1999
Harley Davidson FXSTSB Softail Bad Boy 1995
Harley Davidson FXSTSB Softail Bad Boy 1996
Harley Davidson FXSTSB Softail Bad Boy 1997
Harley Davidson FXWG Wide Glide 1984
Harley Davidson FXWG Wide Glide 1985
Harley Davidson FXWG Wide Glide 1986