S&S Cycle HI-4N Ignition & Coil Kit For Harley 1984-1999
S&S Cycle HI-4N Ignition & Coil Kit: The Ultimate Spark for Evolution Engines
The S&S Cycle HI-4N Ignition & Coil Kit is the most complete and reliable ignition solution available for Harley-Davidson Evolution-era motorcycles. By combining the legendary HI-4N digital ignition module with a perfectly matched high-output coil, S&S Cycle offers a “bolt-on” performance package that eliminates the weaknesses of factory electronic modules and mechanical advance systems. Whether you are building a high-compression hot rod or refreshing a high-mileage cruiser, this kit delivers modern digital precision to your classic V-Twin.
Heavy-Duty Design and Unmatched Durability
The HI-4N module features a rugged aluminum housing designed to withstand the extreme heat and vibration found inside the engine’s nose cone. Unlike other modules that use plastic or thin metal, the HI-4N is built to last. The internal electronics are fully potted to protect against moisture and mechanical shock, ensuring that your ignition timing stays rock-solid through thousands of miles of hard riding.
Total Tuning Control: Selectable Advance Curves
Every engine has unique timing requirements based on its cam profile, compression ratio, and fuel quality. The HI-4N features easy-to-use rotary switches that allow you to select between multiple advance curves. You can fine-tune the timing to prevent engine knock (detonation) while maximizing torque and top-end power. Additionally, the module features a separate curve for rear cylinder timing, allowing for precise offset adjustments to keep your engine running cooler and smoother.
Optimized Single-Fire Performance
This kit includes a high-output single-fire coil, which is a major upgrade over the stock “dual-fire” setup. In a single-fire system, each cylinder receives a spark only on its compression stroke, eliminating the “wasted spark” on the exhaust stroke. This results in reduced engine vibration, easier starting, and a more stable idle. The matched coil ensures that the HI-4N module can deliver a hotter, more consistent spark across the entire RPM range.
Advanced Features: Rev Limiter & Start Modes
The HI-4N is packed with professional-grade features, including a built-in adjustable rev limiter that can be set in 100-RPM increments to protect your valvetrain. It also features a specialized Kick-Start mode that provides a spark on the very first compression stroke, making it much easier to fire up kick-only custom builds. For electric-start bikes, the standard mode delays the spark for two revolutions to protect the starter motor from violent kick-back.
Fitment and Compatibility (1984–1999)
This kit (Part # 550-0502) is designed for “nose cone” ignition applications, including:
- Harley Big Twin (1984–1999): Evolution (Evo) engines (Softail, Dyna, Touring).
- Harley Sportster (1986–2003): All 883 and 1200 Evolution Sportster models.
- S&S Engines: Direct fit for S&S V-Series engines and other aftermarket Evo-style builds.
S&S HI-4N Ignition & Coil Kit For Harley
Features
One piece machined aluminum housing reduces vibration and improves heat dissipation and reliability
Improved kick start algorithm designed to start as easily as points
More power than the stock ignition
BCD switches with solid detent and legible marking allow easy and repeatable adjustments of mode, advance rate, and rev limit
Single-fire and dual-fire function built into a single module
Flexible wiring harness makes installation easier
Initial timing marks allow precise adjustment and reinstallation
Sensor covers integrated into housing to provide protection during installation
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| S&S Cycle HI-4N Ignition & Coil Kit For Harley 1984-1999 | 2092 | 754-312 | 4707 | 550-0502 | In Stock: Ships within 24 hours |
Fitment Notes & Exceptions
The HI-4N replaces the original equipment (OE) point or electronic ignition system on 1970 – 1999 big twin (except Twin Cam) and 1971 – 1990 Sportster models.
Will not work with fuel injected or dual-fire models
This Product Fits
Harley Davidson
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 1985
FLH 1970-1985
Low Glide/Low Rider FXRS 1984-1993
Low Rider Chrome FXRC 1985, 1986, 1987, 1988
Low Rider Custom FXLR 1987-1994
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 1984-1992
Sport Glide Grand Touring FXRD 1986
Super Glide FXE 1984, 1985
Super Glide FXR 1994
Tour Glide Classic FLTC/I 1979-1991
Tour Glide FLT 1979-1986
Tour Glide Ultra Classic FLTCU/I 1989-1996
Wide Glide FXWG 1984, 1985, 1986
Installation
S&S Cycle HI-4N Ignition & Coil Kit For Harley 1984-1999 Installation
Coil Installation
