Question about Harley Davidson FLHR - FLHRCI Road king Motorcycles
To begin with, a 1994 Evolution powered Road King did not come from the factory with a points type ignition. It came with a solid state ignition system. Harley went to a solid state ignition in their Big Twin engines in 1979. If your's has points in it, it has been converted to that system. So, I'll simply explain how an ignition system works in a general manner.
When you turn the ignition switch on, voltage is supplied to the primary windings in the coil. This voltage builds up a magnetic field. When the points, or the Hall effect sensor in the case of an electronic ignition system, breaks the circuit ground, the magnetic field collapses inducing a high voltage low current pulse in the secondary windings of the coil. This pulse goes to the spark plug via the spark plug wires where it jumps the gap between the spark plug's center electrode and the ground electrode.
Now, in a points type system, the ignition timing must be advanced by means of a mechanical advance unit where the electronic ignition uses electronic circuitry to advance the timing according the RPM of the engine.
Posted on May 29, 2011
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Posted on Jan 02, 2017
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