The Dyna S electronic ignition system is a high-performance upgrade for a wide range of Harley-Davidson models, specifically those from 1970 through the early 2000s. Designed to maintain the factory advance curve while offering improved spark voltage and ignition efficiency, the system is a popular choice among motorcyclists seeking enhanced performance and reliability. This article provides a detailed, step-by-step guide to installing the Dyna S ignition system, based on technical documentation and manufacturer specifications.
The installation process involves replacing the original ignition components with the Dyna S unit, which is housed entirely behind the ignition cover. The system utilizes a magnetic rotor and original spark advancer, ensuring compatibility with older models. Additional components such as high-performance coils and a rewired harness are included to ensure optimal operation. The installation is straightforward but requires attention to detail, particularly in timing adjustments and electrical connections.
Below is a comprehensive breakdown of the installation process, compatibility details, and performance features of the Dyna S system.
Compatibility and Supported Models
The Dyna S electronic ignition system is compatible with a variety of Harley-Davidson models spanning multiple model lines and production years. According to manufacturer documentation, the system supports the following models:
- FLH Electra Glide: 1970–1984
- FLHR Road King: 1994–1998
- FLHS Electra Glide Sport: 1980–1993
- FLHT Electra Glide Standard: 1986–1998
- FLHTC Electra Glide Classic: 1983–1997
- FLHTCU Electra Glide Ultra Classic: 1989–1997
- FLHX Electra Glide Special: 1984
- FLST Heritage Softail: 1986–1990
- FLSTC Heritage Softail Classic: 1988–1999
- FLSTF Fat Boy: 1990–1999
- FLSTN Heritage Softail Nostalgia: 1993
- FLSTN Heritage Softail Special: 1994–1996
- FLSTS Heritage Springer: 1997–1999
- FLT Tour Glide: 1980–1983
- FLTC Tour Glide Classic: 1981–1991
- FLTCU Tour Glide Ultra Classic: 1989–1996
- FLTR Road Glide: 1998
- FX Super Glide: 1971–1978
- FXB Sturgis: 1980–1982
- FXD Dyna Super Glide: 1995–1998
- FXDC Super Glide Custom: 1992
- FXDG Disc Glide: 1983
- FXDL Dyna Low Rider: 1993–1998
- FXDWG Dyna Wide Glide: 1993–1998
- FXE Super Glide: 1974–1984
- FXEF Fat Bob: 1979–1985
- FXLR Low Rider Custom: 1987–1994
- FXR Super Glide II: 1982–1994
- FXR2, FXR3, FXR4: 1999–2000
- FXRC Low Rider Chrome: 1985, 1987
- FXRD Sport Glide Grand Touring: 1986
- FXRDG Disc Glide: 1984
- FXRS Low Glide: 1982–1992
- FXRT Sport Glide: 1983–1992
- FXS Low Rider: 1977–1982
This extensive list of supported models highlights the versatility of the Dyna S system, which is engineered to work with both carbureted and electronically controlled engines. The system is not legal for sale or use in California, as noted in the manufacturer’s disclaimer.
Key Features and Technical Specifications
The Dyna S ignition system is designed to deliver high performance and reliability. Key features include:
- Spark Voltage: The system produces spark voltages in excess of 30,000 volts, significantly higher than standard factory systems. This increased voltage ensures more consistent and powerful ignition, even under high-compression or modified engine conditions.
- Manufacturing and Warranty: All Dyna S ignition components are manufactured in the United States and are guaranteed against defects in materials and workmanship.
- Ignition Curves and Modes: The system includes preprogrammed ignition curves and a built-in rev limiter. Users can select their preferred curve using switches on the rear of the ignition module. Additionally, the system supports both single- and dual-fire ignition modes, making it adaptable to a wide range of engine setups.
- LED Troubleshooting: The ignition module includes an LED for troubleshooting and static timing adjustments. This feature simplifies diagnostics and ensures accurate timing settings during installation.
Installation Process Overview
The installation process for the Dyna S system involves several key steps. Below is a detailed breakdown of each step, based on technical instructions and manufacturer guidelines.
Step 1: Preparation and Disassembly
Before beginning the installation, ensure the motorcycle is turned off and the battery is disconnected. Gather the necessary tools, including a screwdriver, wrench set, and a timing light if required. Remove the ignition cover and inspect the existing ignition components. If the timing cover has never been removed, note that the stock rivets will need to be drilled out carefully to avoid damaging the electronic ignition pickup.
Step 2: Installing the Timing Cover
After removing the stock timing cover, install the new timing cover provided with the Dyna S system. If the original cover is in good condition and the manufacturer recommends against replacing it (e.g., for non-modified engines), it can be left in place. However, for optimal performance and ease of installation, it is recommended to use a plain-chrome timing cover as specified in the manufacturer's installation guide.
Step 3: Mounting the Ignition Module
Position the Dyna S ignition module behind the ignition cover. The module contains a seven-plug wiring harness that connects to most late-model Harley-Davidson wiring harnesses. Carefully route the wiring and secure the module in place using the mounting brackets provided.
Step 4: Setting the Ignition Timing
To set the ignition timing, follow these steps:
- Remove the spark plugs and place the motorcycle in gear.
- Rotate the rear wheel to bring the front cylinder to Top Dead Center (TDC) on the compression stroke. This can be verified by observing the TDC mark in the inspection hole.
- Rotate the baseplate of the ignition module until the LED on the module turns off and then back on. The baseplate should be tightened at the point where the LED just turns off while rotating the baseplate in a clockwise direction.
- Once the timing is set, re-install the timing cover and secure it in place.
Step 5: Connecting the Wires and Final Checks
Plug in the seven-plug wiring harness and ensure all connections are secure. Double-check the wiring diagram provided with the system to confirm that all wires are connected correctly. Once the wiring is complete, reattach the ignition cover and secure it with the appropriate fasteners.
Step 6: Testing the System
Before starting the motorcycle, verify that the LED on the ignition module behaves as expected during the static timing process. Once everything is connected and secured, reconnect the battery and start the engine. Observe the operation of the LED for any signs of irregularities or misfires. If everything appears normal, the installation is complete.
Troubleshooting and Maintenance
The LED on the Dyna S ignition module serves as a useful diagnostic tool during both installation and ongoing operation. If the LED behaves abnormally, it may indicate an issue with the ignition timing, wiring connections, or internal module faults. In such cases, recheck the wiring connections and verify the timing setting.
Regular maintenance of the Dyna S system includes inspecting the wiring for signs of wear or damage and ensuring that the timing cover is securely fastened. The manufacturer guarantees the system against defects in materials and workmanship, so any issues related to faulty components can be addressed through warranty claims.
Performance Considerations
The Dyna S ignition system is designed to enhance the performance of Harley-Davidson motorcycles by providing a more powerful and consistent ignition system. The increased spark voltage and advanced ignition curves contribute to improved throttle response, smoother engine operation, and reduced vibration at highway RPMs. Additionally, the system supports a wide range of engine setups, from stock configurations to modified or race-tuned engines.
Users can select between single- and dual-fire modes depending on the type of engine and ignition system in use. This flexibility ensures that the system can be adapted to a variety of applications without requiring significant modifications to the engine or ignition setup.
Safety and Compliance
The Dyna S system is not legal for sale or use in California, as stated in the manufacturer’s product documentation. This restriction is due to compliance requirements related to emissions and ignition performance standards. Users in California should be aware of this limitation and consult local regulations before purchasing or installing the system.
In terms of safety, the system retains the factory advance curve, ensuring that the ignition timing remains within safe operating parameters. The use of high-quality, American-made components also contributes to the overall safety and reliability of the system.
Conclusion
The Dyna S electronic ignition system is a versatile and high-performance upgrade for a wide range of Harley-Davidson motorcycles. With its ability to maintain the factory advance curve while delivering increased spark voltage and ignition efficiency, the system offers significant improvements in engine performance and reliability. The installation process is straightforward but requires careful attention to detail, particularly in timing adjustments and wiring connections.
By following the step-by-step installation guide outlined in this article, users can successfully upgrade their motorcycle’s ignition system and enjoy enhanced performance and smoother operation. Whether for street riding, touring, or racing applications, the Dyna S system provides a reliable and effective solution for Harley-Davidson owners seeking to improve their vehicle’s ignition performance.