Electronic Ignition Module, Single Fire, Programmable, Replaces OE 53-644

Overview Programmable single-fire electronic ignition module for carbureted motorcycle applications. It supports single-fire or dual-fire operation with single-plug or dual-plug heads when used with appropriate coils. Key Features - Eight advance curves - Adjustable rev protection from 6,000 to 7,500 rpm - Adjustable timing retard for nitrous and turbo applications - Built-in tach driver and timing indicator - Over-current, short-circuit, and over-voltage protection - One-piece aluminum housing with thermally conductive epoxy encapsulation Fitment Notes Does not fit EFI models. Excepts the 1200S Sport among the listed Sportster applications. Appropriate coils are required for the stated firing and plug configurations. Reference Numbers Replaces OE: 53-644 What's Included 1 x Electronic Ignition Module Installation Static timing can be set using the built-in timing indicator; the source states that no timing light is required. Vehicle Applications 1970-1999 Harley-Davidson Big Twin (Carbureted) 1971-2003 Harley-Davidson Sportster (Excludes 1200S Sport; carbureted applications implied by fitment description)