Hayden M6 Self-Adjusting Primary Chain Tensioner for 1991-2003 Harley-Davidson Sportster CARB this Model B tail lamp

this Model B tail lamp can stand the test of time

Apply at 70 degrees F or above

Uses donor bike's stock wheel

locking washers

Hayden M6 Self-Adjusting Primary Chain Tensioner for 1991-2003 Harley-Davidson Sportster CARB this Model B tail lampHayden M6 Self Adjusting Primary Chain Tensioner for 1991 2003 Harley Davidson Sportster The primary chain in a Harley Davidson Sporty is strong, but it has its shortcomings. Chains 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 primary chain