Hayden M6 Self-Adjusting Primary Chain Tensioner for 2001-2006 Harley-Davidson Big Twin Seat mounts & Springs Whether you're talking quality of

Whether you're talking quality of construction or simple good looks

classic looks are hard to beat

finicky mechanically-actuated switches

The brackets are TIG welded and powder coated steel

affordable option that’s easy on the wallet

Hayden M6 Self-Adjusting Primary Chain Tensioner for 2001-2006 Harley-Davidson Big Twin Seat mounts & Springs Whether you're talking quality ofHayden M6 Self Adjusting Primary Chain Tensioner for 2001 2006 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