Completely adjustable ignition system with 32 bit architecture and precision. Has 256 selectable advance curves and 16 different rev limits. When you already have a cam sensor with a single pick up this ignition will work in Dual Fire mode with any Dual Fire (two-wire) coil. When your cam sensor has two pick ups the ignition works as Single Fire. Both Single fire and Dual Fire sensor plates are also available. Works on Shovelhead, Evolution Big Twin, Evolution Sportster thru 2003, Buell thru 2007. Note that changing from Dual Fire to Single Fire or vise versa requires a matching coil type.