HI-4N Electronic Ignition Module Compatible with Harley Davidson Big Twin 1970-1999, Single & Dual Fire Ignition, Adjustable Rev Limit, Fits FLH FLT FXST FLST FXD FXR FX Models, 550-0501

motorcycle ignition system with this HI-4N electronic ignition module compatible with Harley-Davidson Big Twin models from 1970-1999. Designed for FLH, FLT, FXST, FLST, FXD, FXR, and FX applications, this ignition module combines selectable single-fire and dual-fire functionality into one compact unit.

• Compatible with many Harley-Davidson Big Twin models from 1970-1999, including FLH, FLT, FXST, FLST, FXD, FXR and FX series.
• Built-in selectable single-fire and dual-fire ignition modes in one compact module. Rotary switch configuration allows convenient ignition setting adjustments for different riding styles and engine setups.
• Features a full metal housing and back plate structure designed to help dissipate heat and protect internal components from vibration, moisture, and road debris. Electronics are enclosed for added durability during daily riding conditions.
• Equipped with four rotary switches for ignition mode selection, advance curve adjustment, and rev limiter settings. Timing degree markings on the flange help support accurate installation and setup.
• Designed with integrated sensor and magnet housings plus a convenient cable routing notch to simplify installation and help reduce wire stress during mounting. Compatible with a wide range of Harley-style ignition system configurations.