Dynatek Dyna S Single Fire Ignition Kit For Harley 1970-1999

Dynatek Dyna S Single Fire Ignition Kit For Harley 1970-1999

S&S Cycle HI-4N: The Toughest Digital Ignition for Evolution Engines

The S&S Cycle HI-4N Single & Dual Fire Ignition Module is the next generation of the legendary HI-4 series. Engineered to solve the heat and vibration issues that plague plastic-bodied ignitions, the HI-4N features a heavy-duty billet aluminum housing that acts as a heat sink to protect the sensitive electronics within. This module is the ultimate upgrade for Harley-Davidson Evolution riders who demand precision timing and a “set-it-and-forget-it” level of reliability.

Versatile Ignition Modes: Single or Dual Fire

The HI-4N is designed for maximum flexibility. With a simple flip of a switch, you can configure the module for Dual-Fire (using your stock coil) or Single-Fire (firing each cylinder independently for smoother operation and reduced vibration). This makes it an ideal choice for riders who want to upgrade their ignition module now and potentially move to a high-output single-fire coil system later without buying a new ignition.

Optimized Performance Tuning

Tuning your V-Twin has never been easier. The HI-4N features on-board rotary switches that allow you to select from four different advance curves, ranging from stock to aggressive performance maps. This allows you to eliminate engine “pinging” (detonation) while maximizing torque. Additionally, the module features a separate rear cylinder timing adjustment, allowing you to offset the timing of the rear cylinder to ensure it runs cooler and more efficiently than the front.

Selectable Start Modes: Electric or Kick

Whether you are riding a modern electric-start Softail or a custom kick-only chopper, the HI-4N has you covered. The “Kick Start” mode provides a spark on the very first compression stroke for immediate ignition. The “Electric Start” mode delays the spark for two revolutions, allowing the starter motor to reach full speed—this virtually eliminates engine kick-back, protecting your starter and ring gear from expensive damage.

Rugged Construction & Built-in Protection

The HI-4N is built to survive. The electronics are fully encapsulated (potted) to protect against moisture, oil, and mechanical shock. It includes a built-in adjustable rev limiter that can be set in 100-RPM increments to protect your valvetrain. A built-in static timing LED allows you to time the engine perfectly without the need for a strobe light, making installation straightforward for the DIY mechanic.

Fitment and Compatibility (1984–1999)

This module (Part # 550-0501) fits “nose cone” ignition applications:

• Harley Big Twin (1984–1999): Evolution (Evo) engines (Softail, Dyna, and Touring).
• Harley Sportster (1986–2003): All 883 and 1200 Evolution Sportster models.
• Custom V-Twins: Direct replacement for S&S V-Series and other aftermarket Evo-style engines.

Dynatek Dyna S Single Fire Ignition Kit For Harley
Features:

These systems use magnetic rotors with OEM-style mechanical advance spark mechanisms to retain factory advance curves and eliminate points and condensers by replacing the points ignition with a high-performance dual or single-fire system
Feature improved performance, easy installation
Completely self-contained, and install behind the points cover without modification
Mechanical advance unit assembly parts needed for installation if one is not present

 

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Dynatek Dyna S Single Fire Ignition Kit For Harley 1970-1999	6696	381-316		DSK6-2/DSK62/12097	In Stock: Ships within 24 hours

Fitment Notes & Exceptions

A mechanical advance unit is required to run this ignition – if your bike is not equipped with one, you will need to purchase one separately

This Product Fits

Harley Davidson
Disc Glide FXDG 1983
Disc Glide FXRDG 1984
Dyna Convertible FXDS 1994, 1995, 1996, 1997, 1998
Dyna Glide Custom FXDC 1992
Dyna Glide Daytona FXDB-D 1992
Dyna Glide Sturgis FXDB-S 1991
Dyna Low Rider FXDL/I 1993-1998
Dyna Super Glide FXD/I 1995, 1996, 1997, 1998
Dyna Wide Glide FXDWG/I 1993-1998
Electra Glide Classic FLHC 1979, 1980, 1981, 1982
Electra Glide Classic FLHTC/I 1983-1998
Electra Glide Special FLHX 1984
Electra Glide Sport FLHS 1977-1993
Electra Glide Standard FLHT/I 1983-1998
Electra Glide Ultra Classic FLHTCU/I 1989-1998
Fat Bob FXEF 1979, 1980, 1981, 1985
FLH 1970-1985
FLHF 1970, 1971, 1972
FXR2 CVO/SE 1999
FXR3 CVO/SE 1999
FXR4 CVO/SE 2000
Low Glide/Low Rider FXRS 1982-1993
Low Rider Belt FXSB 1982
Low Rider Chrome FXRC 1985, 1986, 1987, 1988
Low Rider Custom FXLR 1987-1994
Low Rider FXS 1977-1982
Low Rider Sport FXRS-SP 1987-1993
Road Glide FLTR/I 1998
Road King Classic FLHRC/I 1998
Road King FLHR/I 1994, 1995, 1996, 1997, 1998
Softail Bad Boy Springer FXSTSB 1995, 1996, 1997
Softail Custom FXSTC/I 1986-1999
Softail Deuce FXSTD/I 1999
Softail Fat Boy FLSTF/I 1990-1999
Softail Heritage Classic FLSTC/I 1987-1999
Softail Heritage FLST/I 1986, 1987, 1988, 1989, 1990
Softail Heritage Springer FLSTS/I 1997, 1998, 1999
Softail Night Train FXSTB/I 1999
Softail Nostalgia FLSTN/I 1993
Softail Special FLSTN/I 1994, 1995, 1996
Softail Springer FXSTS/I 1988-1999
Softail Standard FXST/I 1984-1999
Sport Glide FXRT 1983-1992
Sport Glide Grand Touring FXRD 1986
Sportster Custom XL1200C 1996-2003
Sportster Custom XL883C 1998-2003
Sportster Deluxe XLH883DLX 1989, 1990, 1991, 1992
Sportster Hugger XLH883HUG 1988-2003
Sportster Roadster XL883R 2002, 2003
Sportster Sport XL1200S 1996, 1997, 1998, 1999
Sportster XLH1100 1986, 1987
Sportster XLH1200 1988-2003
Sportster XLH883 1986-2003
Sturgis FXB 1980, 1981, 1982
Super Glide FX 1971-1979
Super Glide FXE 1974-1985
Super Glide FXR 1994
Super Glide II FXR 1982, 1983
Tour Glide Classic FLTC/I 1979-1991
Tour Glide FLT 1979-1986
Tour Glide Ultra Classic FLTCU/I 1989-1995
Wide Glide FXWG 1980-1986
XL 1971-1984
XLCH 1971-1979
XLCR Café Racer 1977, 1978
XLH1000 1972-1985
XLH900 1971
XLS Roadster 1979-1985
XLT 1977, 1978
XLX-61 1983, 1984, 1985