S&S Cycle 550-0501 HI-4N Ignition Single or Dual Fire

S&S ignition's one piece machined aluminum housing reduces the vibration and improves dissipation and reliability.

The S&S Cycle HI-4N Ignition, part number 550-0501, combines single-fire and dual-fire functionality in one module. It allows adjustments to the advance rate and rev limit, providing configurable ignition control for supported applications.

Initial timing marks help with adjustment and reinstallation, while integrated sensor covers protect the sensors during installation. The ignition also features an improved kick-start algorithm designed to support easier starting and a flexible wiring harness to simplify installation.

This ignition fits 1984 through 1993 Harley-Davidson FLT models. Accessory items listed for this product include the 16-1736 Timer Device Tool and 16-0715 Clean Time Tool.

Features:

• Single- and dual-fire functionality built into one ignition module
• Adjustable advance rate and rev limit
• Initial timing marks support adjustment and reinstallation
• Integrated sensor covers provide protection during installation
• Improved kick-start algorithm designed to support easier starting
• Flexible wiring harness helps simplify installation
• Fits 1984 through 1993 Harley-Davidson FLT models

Fitment:
Harley Davidson FLST 1986
Harley Davidson FLST 1987
Harley Davidson FLST 1988
Harley Davidson FLST 1989
Harley Davidson FLST 1990
Harley Davidson FLST 1991
Harley Davidson FLST 1992
Harley Davidson FLST 1993
Harley Davidson FLST 1994
Harley Davidson FLST 1995
Harley Davidson FLST 1996
Harley Davidson FLST 1997
Harley Davidson FLST 1998
Harley Davidson FLST 1999
Harley Davidson FLT 1984
Harley Davidson FLT 1985
Harley Davidson FLT 1986
Harley Davidson FLT 1987
Harley Davidson FLT 1988
Harley Davidson FLT 1989
Harley Davidson FLT 1990
Harley Davidson FLT 1991
Harley Davidson FLT 1992
Harley Davidson FLT 1993
Harley Davidson FLT 1994
Harley Davidson FLT 1995
Harley Davidson FLT 1996
Harley Davidson FLT 1997
Harley Davidson FLT 1998
Harley Davidson FLT 1999
Harley Davidson FXD 1991
Harley Davidson FXD 1992
Harley Davidson FXD 1993
Harley Davidson FXD 1994
Harley Davidson FXD 1995
Harley Davidson FXD 1996
Harley Davidson FXD 1997
Harley Davidson FXD 1998
Harley Davidson FXD 1999
Harley Davidson FXR 1984
Harley Davidson FXR 1985
Harley Davidson FXR 1986
Harley Davidson FXR 1987
Harley Davidson FXR 1988
Harley Davidson FXR 1989
Harley Davidson FXR 1990
Harley Davidson FXR 1991
Harley Davidson FXR 1992
Harley Davidson FXR 1993
Harley Davidson FXR 1994
Harley Davidson FXST 1984
Harley Davidson FXST 1985
Harley Davidson FXST 1986
Harley Davidson FXST 1987
Harley Davidson FXST 1988
Harley Davidson FXST 1989
Harley Davidson FXST 1990
Harley Davidson FXST 1991
Harley Davidson FXST 1992
Harley Davidson FXST 1993
Harley Davidson FXST 1994
Harley Davidson FXST 1995
Harley Davidson FXST 1996
Harley Davidson FXST 1997
Harley Davidson FXST 1998
Harley Davidson FXST 1999