Dyna S ignition module. Single fire with mechanical advance.
Dyna-S electronic ignition modules are available for single or dual plugged head.
Fits 70-99 Bigtwins ( excl TC ) an 71-03 sportster models.
A mechanical advance must be purchased separately or reuse the original if it is in good condition.
Works with the stock 3 or 5 Ohm Coils but Dyna advices:
Dyna 3 Ohm for race use and Dyna 5 Ohm for street use.
Note: it’s recommended to use ignition modules & coils of the same manufacturer.
Intermixing different brands may cause premature failure.
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