25" diameter tube tapers down to 1" to mate to your stock controls and runs a 1" clamp area

85-86 FX Model

FXRT and FXRD models

spring cover

99-07 FLT/Touring

DYNATEK, DYNA-S IGNITION MODULE. SINGLE FIRE Pants and Belts 25" diameter tube tapers downDyna S ignition module for single fire applications. Comes complete with rotor. Can be used for single or dual plugged heads. The required mechanical advance unit must be purchased separately. Note: Dyna coil recommendations: Dyna 5 Ohm for street use, Dyna 3 Ohm for race use. Note: It is recommended to use ignition modules & coils of the same manufacturer. Intermixing different brands may cause premature failure. Note: Difference between Single &