Hayden M6 Self-Adjusting Primary Chain Tensioner for 1965-1993 Harley-Davidson Big Twin Tools & Chemicals Big Twin Parts Lowers the front end of

Lowers the front end of your bike 2"

This advance formulation has been developed and tested to withstand most octane boosters

These switches have been test-fit to TC Bros

So why not buy a more permanent filter

Fits Harley Davidson FX

Hayden M6 Self-Adjusting Primary Chain Tensioner for 1965-1993 Harley-Davidson Big Twin Tools & Chemicals Big Twin Parts Lowers the front end ofHayden M6 Self Adjusting Primary Chain Tensioner for 1965 1993 Harley Davidson Big Twin The primary case is a defining feature of the Harley Davidson Big Twin, but it has its shortcomings. Chains do require adjustment, and getting the adjustment just right to accommodate shifting and clutch operation can be a balancing act. Why not do it auto magically? Spring loaded tensioner eliminates manual adjustments Applies constant, repeatable tension on the