S&S Cycle IST Ignition System for 1984–99 4 1/8 Bore Big Twin Engines - Manual (Page 10)

NOTES:
• Installer to source appropriate wire for any additions. Use supplied shrink tube and wire cover to insulate and protect wires and connections.
• Stagger any splices in a wire harness bundle. This reduces the chance of wear between adjacent splices. It also makes it easier to pass splices wire through
the harness sleeving.
• Crimp connections are preferred over soldered connections. Soldering causes stress concentrations at the wire to solder joint. Soldered connections are
prone to break in high vibration environments.
• In most cases, the switched ignition power connection is made in the wire leading from the ignition switch to the coil.
• If not using a tach, the tach signal wire may be removed from the connector. If you do remove the wire, be sure to plug the empty hole with the supplied
sealing plug to prevent moisture from entering the connector.
E. Initial Starting and Operation Procedure:
Because the S&S® Intelligent Spark Technology Ignition System is designed to “learn” the specific engine/motorcycle configuration it is being
used for, the following initial starting and operating procedures must be followed after installing the system for the first time. These procedures
need to be followed only once. After that, the motorcycle can be started and ridden as usual.
1. Initial Starting Procedure
NOTE: IMPORTANT! In some applications, a Vehicle Speed Signal (VSS) or Camshaft Position Sensor signal is routed to Pin 21 on the IST module.
In these instances, it is important that the ignition has learned what type of signal is connected. It is important that the wheels remain
motionless while the key is on prior to completing this procedure.
Until the ignition has learned what type of signal is present, it could fire the plugs based on wheel movement if installed on a motorcycle with
the VSS routed to the IST.
In the application described in this instruction sheet, neither signal is used on this input. So, this step is not relevant. If you are installing the IST
module only and not completely familiar with the rest of the wiring, it is recommended that you perform this procedure:
To insure proper learning of the type of signal used in your application:
a. Be sure to start the motorcycle in neutral and on a flat/level surface.
b. Allow the engine to run for a minimum of 10 seconds before turning the key off.
This procedure only needs to be performed once, but it should be repeated if the IST module is installed in another motorcycle.
2. Initial Operating Procedure
Initially, the S&S Intelligent Spark Technology Ignition System operates using a standard ignition-timing map that may not be optimum but is
considered “safe” for most engine configurations. After 3 to 5 hours of operation, with the engine warmed up, the IST Ignition System will have
adjusted the map to create one that is optimized for the particular engine configuration. The IST system will continually adapt to subsequent
changes in riding style, fuel quality, weather conditions and elevation to further optimize the ignition map. For this reason, data recorded using
a chassis dynomometer should be measured after the system has had sufficient time to learn the specific engine parameters.
Ride your motorcycle as you normally would during this initial “learning” period. The IST system will learn and adapt the ignition map to
various conditions as they are encountered – so the more riding you do, the more the system will fine tune itself. Below are some suggested
practices to help the system quickly create the initial optimized timing map:
a. Allow engine to remain at normal operating temperature for at least an hour.
b. Ride up hills and/or inclines.
c. Ride at highway speeds for at least 20 minutes. When road conditions are safe, briefly (1-2 seconds at a time) open the throttle all the
way.
d. Ride through intersections/stretches of road where second and third gear roll-ons are required.
F. Basic Troubleshooting:
Below are some suggestions if any problems are encountered with the IST Ignition Module.
1. Problem: Engine cranks but will not start.
Possible solutions:
a. Check that the gas tank is full and that the fuel petcock is turned on.
b. Check that coil wires (plug and harness) are installed properly.
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