Hayden M6 Self-Adjusting Primary Chain Tensioner for 1965-1993 Harley-Davidson Big Twin Tools & Chemicals Big Twin Parts Keep a sharper eye on

Keep a sharper eye on things than your factory idiot light permits with this kit that positions the gauge right on the top of the rear rocker box

These switches have been test-fit to TC Bros

Lowers the front end of your bike 2"

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

Designed for dual fire ignitions with single spark plug (per head)

Hayden M6 Self-Adjusting Primary Chain Tensioner for 1965-1993 Harley-Davidson Big Twin Tools & Chemicals Big Twin Parts Keep a sharper eye onHayden 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