21860 Ignition module. Electronic advance. Race

This Compu-Fire Race ignition module is a high-performance electronic advance unit designed specifically for electric start models. It is built for demanding setups, offering selectable single or dual fire and single or dual plug configurations. With eight adjustable advance curves and eight RPM limits ranging from 6000 to 7500 RPM, it allows you to fine-tune your engine's timing via a simple rotary switch. It features a built-in static timing light and soft-start circuitry for easier cranking. This module fits 1970 to 1999 Big Twins, excluding Twin Cam and fuel-injected models, as well as 1971 to 2001 Sportsters, excluding the 1200S. Note that a tach adapter is required for correct RPM readings on single fire setups.