Favorite S&S Ist Ignition Wiring Diagram S&S Cycle IST Ignition System For 1984–99 4 1/8 Bore Big Twin - All unmarried fireplace coils are like minded with the s&s ignition in the event that they have a resistance of zero.5 to a few ohms. The same old score for and aftermarket single fire coil is 3 ohms. Coils with better resistance will decrease ignition output. In addition to the spark plug terminals, an o.E.M single fire coil will usually have 3 wiring terminals: a terrible terminal for the the front cylinder, a not unusual 12v terminal, and terrible terminal for the rear cylinder that is the maximum not unusual style of unmarried hearth coil.
? 1984-1999 wiring harness adapter (s&s #55-1021) object (a) • cylinder head temperature sensor (s&s #55-1039) object (b) • camshaft function sensor assembly (s&s #55-1024). Object (c) • camshaft role rotor assembly (s&s # 55-1034) item (d). Be aware: if the tank is eliminated or raised, quickly replace it to insure clearance for the engine temperature, map, and knock sensor quantities of the harness. Reroute any wires that may be broken by way of putting in the tank.
The s&s® ignition machine may also guide a spread of different ignition coil combos as long as they may be linked for unmarried fire operation, and yield a very last resistance of 0.5 to three ohms. The ignition is likewise well matched with dual plug heads the usage of the precise coil configuration. All connection with harley-davidson® component numbers is for identity functions handiest. We in no way are implying that any of s&s® cycle’s merchandise are authentic equipment parts or that they're equal to the corresponding harley-davidson® element wide variety shown.
A 7-to-eight-pin adapter is to be had via aftermarket assets which includes drag specialties and custom chrome. It's far a generic adapter that lets in many one-of-a-kind ignition systems (inclusive of the s&s ist ignition) to paintings on bikes with a 7-pin connector. If the ist set up is on a bike with a 7-pin connector, an adapter may be bought one at a time.