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The HI-4 ignition system is intended for use with Harley-Davidson motorcycles. The HI-4 replaces the original equipment (OE) electronic ignition system on 1978 and later models as well as the points and mechanical advance on early models. 1996 and later models have a vehicle tilt sensor that shuts off the ignition if the motorcycle rolls on its side. This feature is disabled when the HI-4 ignition is installed. COIL AND SPARK PLUG CABLE CONSIDERATIONS Coils used with the HI-4 must have at least 2 ohms primary resistance. Coils with 4 ohms or higher may be used, but may not produce optimum output. REMOVAL OF POINTS IGNITION - EARLY MODELS PRIOR TO 1978 1. Turn ignition switch off and disconnect battery ground cable. Disconnect wire going from breaker points to Coil – (negative) terminal. REMOVAL OF OE ELECTRONIC IGNITION SYSTEM - 1978 AND 1979 MODELS. HI-4 Ignition System Installation. Most motorcycle coils do not have terminals marked. Most single fire coils use the center terminal for +12V and the outer two terminals for front and rear cylinder Coil-. For dual- fire coils use either terminal for Coil+ and the other one for Coil. start the engine. Remove and save the two stand offs and washers (items 4-5). Remove the breaker plate assembly, wiring, cam, and advance assembly (items 6-10). The mode switch setting must match the wiring hookup or the engine will not run. For example, if you have a dual fire coil hookup as shown in Figure 5. Refer to Figure 10 and find the diagram with a matching TDC mark. Use the corresponding advance mark shown in the diagram.
Tags : harley davidson motorcycles, spark plug cable, tdc mark, electronic ignition system, tilt sensor, primary resistance, dual fire, mechanical advance, rear cylinder, optimum output, center terminal, ground cable, stand offs, mode switch, harley davidson
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