TwinPower 488751 Big Twin and XL Starter Relay – Replaces Harley Davidson 31506-79B

Description

The TwinPower 488751 starter relay is a high-quality replacement designed for a range of Harley Davidson models from 1988 to 1990, including XLH1200, XLH883, and Sportster variants. Constructed to meet or exceed OEM standards, this relay ensures reliable starting performance and durability under demanding conditions. Its robust design makes it an excellent choice for restoring or maintaining your Harley Davidson motorcycle’s electrical system.

Crafted with precision, the TwinPower relay features a compact size for easy installation and compatibility. It is crafted from durable materials that withstand vibration, heat, and electrical load fluctuations, providing long-lasting service. The relay’s design ensures seamless integration into your motorcycle’s electrical circuitry, offering a dependable solution for starting issues or electrical system upgrades.

Designed to replace Harley Davidson part number 31506-79B, this relay is sold individually and is suitable for various Harley models from the late 1980s. Its straightforward installation process allows for quick repairs, helping you get back on the road faster. Whether you’re performing routine maintenance or troubleshooting starting problems, the TwinPower 488751 relay offers a trusted, OEM-compatible solution to keep your Harley running smoothly.

Features:

• Replaces Harley Davidson part number 31506-79B

• Designed for Harley Davidson XLH1200, XLH883, and Sportster models from 1988 to 1990

• Constructed with durable materials for long-lasting reliability

• Compact size for easy installation and compatibility

• Sold individually for versatile use

Fitment:
Harley Davidson FLHS Electra Glide Sport Base 1980
Harley Davidson FLHS Electra Glide Sport Base 1981
Harley Davidson FLHS Electra Glide Sport Base 1982
Harley Davidson FLHS Electra Glide Sport Base 1983
Harley Davidson FLHS Electra Glide Sport Base 1984
Harley Davidson FLHS Electra Glide Sport Base 1987
Harley Davidson FLHS Electra Glide Sport Base 1988
Harley Davidson FLHS Electra Glide Sport Base 1989
Harley Davidson FLHS Electra Glide Sport Base 1990
Harley Davidson FLHS Electra Glide Sport Base 1991
Harley Davidson FLHS Electra Glide Sport Base 1992
Harley Davidson FLHS Electra Glide Sport Base 1993
Harley Davidson FLHTC Electra Glide Classic Base 1983
Harley Davidson FLHTC Electra Glide Classic Base 1984
Harley Davidson FLHTC Electra Glide Classic Base 1985
Harley Davidson FLHTC Electra Glide Classic Base 1986
Harley Davidson FLHTC Electra Glide Classic Base 1987
Harley Davidson FLHTC Electra Glide Classic Base 1988
Harley Davidson FLHTC Electra Glide Classic Base 1989
Harley Davidson FLHTC Electra Glide Classic Base 1990
Harley Davidson FLHTC Electra Glide Classic Base 1992
Harley Davidson FLHTC Electra Glide Classic Base 1993
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 1989
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 1990
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 1991
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 1992
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 1993
Harley Davidson FLST Heritage Softail Base 1986
Harley Davidson FLST Heritage Softail Base 1987
Harley Davidson FLST Heritage Softail Base 1988
Harley Davidson FLST Heritage Softail Base 1989
Harley Davidson FLST Heritage Softail Base 1990
Harley Davidson FLSTC Heritage Softail Classic Base 1988
Harley Davidson FLSTC Heritage Softail Classic Base 1989
Harley Davidson FLSTC Heritage Softail Classic Base 1990
Harley Davidson FLSTC Heritage Softail Classic Base 1991
Harley Davidson FLSTC Heritage Softail Classic Base 1992
Harley Davidson FLSTC Heritage Softail Classic Base 1993
Harley Davidson FLSTF Fat Boy Base 1990
Harley Davidson FLSTF Fat Boy Base 1991
Harley Davidson FLSTF Fat Boy Base 1992
Harley Davidson FLSTF Fat Boy Base 1993
Harley Davidson FXB Sturgis Base 1980
Harley Davidson FXB Sturgis Base 1981
Harley Davidson FXB Sturgis Base 1982
Harley Davidson FXDG Disc Glide Base 1983
Harley Davidson FXE Super Glide Base 1980
Harley Davidson FXE Super Glide Base 1981
Harley Davidson FXE Super Glide Base 1982
Harley Davidson FXE Super Glide Base 1983
Harley Davidson FXE Super Glide Base 1984
Harley Davidson FXEF Fat Bob Base 1980
Harley Davidson FXEF Fat Bob Base 1981
Harley Davidson FXEF Fat Bob Base 1982
Harley Davidson FXEF Fat Bob Base 1983
Harley Davidson FXEF Fat Bob Base 1984
Harley Davidson FXEF Fat Bob Base 1985
Harley Davidson FXLR Low Rider Custom Base 1987
Harley Davidson FXLR Low Rider Custom Base 1988
Harley Davidson FXLR Low Rider Custom Base 1989
Harley Davidson FXLR Low Rider Custom Base 1990
Harley Davidson FXLR Low Rider Custom Base 1991
Harley Davidson FXLR Low Rider Custom Base 1992
Harley Davidson FXLR Low Rider Custom Base 1993
Harley Davidson FXR Super Glide II Base 1982
Harley Davidson FXR Super Glide II Base 1983
Harley Davidson FXR Super Glide II Base 1984
Harley Davidson FXR Super Glide II Base 1985
Harley Davidson FXR Super Glide II Base 1986
Harley Davidson FXR Super Glide II Base 1987
Harley Davidson FXR Super Glide II Base 1988
Harley Davidson FXR Super Glide II Base 1989
Harley Davidson FXR Super Glide II Base 1990
Harley Davidson FXR Super Glide II Base 1991
Harley Davidson FXR Super Glide II Base 1992
Harley Davidson FXR Super Glide II Base 1993
Harley Davidson FXRC Low Rider Chrome Base 1985
Harley Davidson FXRC Low Rider Chrome Base 1986
Harley Davidson FXRC Low Rider Chrome Base 1987
Harley Davidson FXRD Sport Glide Grand Touring Base 1986
Harley Davidson FXRDG Disc Glide Base 1984
Harley Davidson FXRS Low Glide Base 1982
Harley Davidson FXRS Low Glide Base 1983
Harley Davidson FXRS Low Glide Base 1984
Harley Davidson FXRS Low Glide Base 1985
Harley Davidson FXRS Low Glide Base 1986
Harley Davidson FXRS Low Glide Base 1987
Harley Davidson FXRS Low Glide Base 1988
Harley Davidson FXRS Low Glide Base 1989
Harley Davidson FXRS Low Glide Base 1990
Harley Davidson FXRS Low Glide Base 1991
Harley Davidson FXRS Low Glide Base 1992
Harley Davidson FXRS-Conv Low Rider Sport Convertible Base 1990
Harley Davidson FXRS-Conv Low Rider Sport Convertible Base 1991
Harley Davidson FXRS-Conv Low Rider Sport Convertible Base 1992
Harley Davidson FXRS-Conv Low Rider Sport Convertible Base 1993
Harley Davidson FXRT Sport Glide Base 1983
Harley Davidson FXRT Sport Glide Base 1984
Harley Davidson FXRT Sport Glide Base 1985
Harley Davidson FXRT Sport Glide Base 1986
Harley Davidson FXRT Sport Glide Base 1987
Harley Davidson FXRT Sport Glide Base 1988
Harley Davidson FXRT Sport Glide Base 1989
Harley Davidson FXRT Sport Glide Base 1990
Harley Davidson FXRT Sport Glide Base 1991
Harley Davidson FXRT Sport Glide Base 1992
Harley Davidson FXS Low Rider Base 1980
Harley Davidson FXS Low Rider Base 1981
Harley Davidson FXS Low Rider Base 1982
Harley Davidson FXSB Low Rider – Belt Base 1983
Harley Davidson FXSB Low Rider – Belt Base 1984
Harley Davidson FXSB Low Rider – Belt Base 1985
Harley Davidson FXST Softail Standard Base 1984
Harley Davidson FXST Softail Standard Base 1985
Harley Davidson FXST Softail Standard Base 1986
Harley Davidson FXST Softail Standard Base 1987
Harley Davidson FXST Softail Standard Base 1988
Harley Davidson FXST Softail Standard Base 1989
Harley Davidson FXST Softail Standard Base 1990
Harley Davidson FXST Softail Standard Base 1991
Harley Davidson FXST Softail Standard Base 1992
Harley Davidson FXST Softail Standard Base 1993
Harley Davidson FXSTC Softail Custom Base 1986
Harley Davidson FXSTC Softail Custom Base 1987
Harley Davidson FXSTC Softail Custom Base 1988
Harley Davidson FXSTC Softail Custom Base 1989
Harley Davidson FXSTC Softail Custom Base 1990
Harley Davidson FXSTC Softail Custom Base 1991
Harley Davidson FXSTC Softail Custom Base 1992
Harley Davidson FXSTC Softail Custom Base 1993
Harley Davidson FXSTS Springer Softail Base 1988
Harley Davidson FXSTS Springer Softail Base 1989
Harley Davidson FXSTS Springer Softail Base 1990
Harley Davidson FXSTS Springer Softail Base 1991
Harley Davidson FXSTS Springer Softail Base 1992
Harley Davidson FXSTS Springer Softail Base 1993
Harley Davidson FXWG Wide Glide Base 1980
Harley Davidson FXWG Wide Glide Base 1981
Harley Davidson FXWG Wide Glide Base 1982
Harley Davidson FXWG Wide Glide Base 1983
Harley Davidson FXWG Wide Glide Base 1984
Harley Davidson FXWG Wide Glide Base 1985
Harley Davidson FXWG Wide Glide Base 1986
Harley Davidson XLH1100 Base 1986
Harley Davidson XLH1100 Base 1987
Harley Davidson XLH1200 Base 1988
Harley Davidson XLH1200 Base 1989
Harley Davidson XLH1200 Base 1990
Harley Davidson XLH1200 Base 1991
Harley Davidson XLH1200 Base 1992
Harley Davidson XLH1200 Base 1993
Harley Davidson XLH883 Base 1986
Harley Davidson XLH883 Base 1987
Harley Davidson XLH883 Base 1988
Harley Davidson XLH883 Base 1989
Harley Davidson XLH883 Base 1990
Harley Davidson XLH883 Base 1991
Harley Davidson XLH883 Base 1992
Harley Davidson XLH883 Base 1993
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1986
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1987
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1988
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1989
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1990
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1991
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1992
Harley Davidson XLH883DLX Sportster 883 Deluxe Base 1993
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1987
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1988
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1989
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1990
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1991
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1992
Harley Davidson XLH883HUG Sportster 883 Hugger Base 1993
Harley Davidson XLS Roadster Base 1980
Harley Davidson XLS Roadster Base 1981
Harley Davidson XLS Roadster Base 1982
Harley Davidson XLS Roadster Base 1983
Harley Davidson XLS Roadster Base 1984
Harley Davidson XLS Roadster Base 1985
Harley Davidson XR1000 Base 1983
Harley Davidson XR1000 Base 1984
Harley Davidson XR1000 Base 1985
Harley-Davidson FXRPF Police Base 1985
Harley-Davidson FXRPF Police Base 1986
Harley-Davidson FXRPF Police Base 1987
Harley-Davidson FXRPF Police Base 1988
Harley-Davidson FXRPF Police Base 1989
Harley-Davidson FXRPF Police Base 1990
Harley-Davidson FXRPF Police Base 1991
Harley-Davidson FXRPF Police Base 1992
Harley-Davidson FXRPF Police Base 1993