This firm mounting magneto prevents for base leaks. Can be used with or without battery. Features auto advance as well as manual retard for easier starting, but has no provision for a base-driven mechanical tacho. It is an easy to install 2-piece design and you don't have to buy any extra mounting hardware.

Fits 1937 thru 1973 45CI, 74CI and 80CI Flatheads, 1952 thru 1956 K & KH, and 1957 thru 1970 XL models