Dynatek, Dyna-S Single Fire Ignition Kit for Harley-Davidson

Complete Dyna-S kit in single-burner with dual 5 ohm coils.
The required mechanical feed unit must be purchased separately.
Note: Difference between Single Fire and Dual Fire: - Dual Fire: This is how pre-Twin Cam engines work.
A single coil is used and both spark plugs fire simultaneously.
This is the simplest system.
It is sometimes said that "wasted" spark steals horsepower.
- Single Fire: This is how the original Twin Cam and M8 engines from 00 onwards worked.
Two separate coils will fire the spark plugs independently, and only the spark plug of the cylinder that is on the compression stroke will fire.
These engines are said to vibrate less and can improve power.
The effects will be more pronounced with hotter chambers and higher RPMs.
Note: For dual fire kit, see 902526.

Compatible with: > 70-99 Big Twin (excl. Twin Cam) and 71-03 Sportster XL models