This key switch fits into a 3/4" diameter hole with two flats

The largest and most noticeable benefit is a smoother charge to the battery

including the T100 and T120 Bonneville (EFI as well as carbureted)

These compact units measure just 5/8” in diameter and mount in a 7/16” hole

Ignition advance and timing degree markings are on the metal flange

Ignition Sensor Assembly - 1980-1994 Harley-Davidson XL 1984-1985 FXST 1980-1993 FLT Length_.736" This key switch fits intoThis replacement ignition sensor assembly includes the pickup, mounting plate, and wires with connectors. Assemblies include pickup, mounting plate and wires with connectors Replaces Harley Davidson OEM# 3240080A Fits 1980 1994 Harley Davidson XL 1984 1985 FXST and 1980 1993 FLT Note: There are no returns on carburetors, electrical items, full frames, hardtails or made to order items (such as magnetos) unless there is a manufacturers defect.