Dynatek Electronic Ignition System - Dual Fire DS6-1Dual Fire (DS6 1) Stock replacement type ignition system is self contained and fits under the stock timer cover Unique hall effect sensors are impervious to dirt and oil Spark scatter is almost eliminated Timing changes less than 3 from 0 8000 RPM Eliminates maintenance and extends spark plug life 3 year manufacturers warranty Note: 80 and later models require conversion to a centrifugal advance mechanism. 71 03 Sportster; 70 99 Big Twin (exc. FI,