Precision-engineered mechanical advance assembly featuring flyweights, cam, and mounting screw—compatible with Harley-Davidson Big Twin and Sportster models from 1970 onward.

Description

Replacement Mechanical Advance
Fits Big Twin 1970/Early 1978 Shovelhead & Sportster 1971/Early 1978 and can be used to replace solid state ignition on most Late 1978/Later models when used in conjunction with a point type coil
Note: Will not fit models with OEM single fire ignition systems
(Imported)
Fits the Following Harley-Davidson Models
1970 to 1978 Shovelhead
1979 to 1984 Shovelhead What Electronic Ignition Has Been Removed
1970 to 1978 XL Models

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