D.I.D is the number one motorcycle chain in the world. D.I.D chains are used by factory races teams from all manufacturers in race series everywhere. The D.I.D Standard Non-O-Ring Chain is designed for low horsepower, smaller displacement mopeds, scooters and vintage motorcycles. For machines originally equipped with non-O-ring chains. Solid rollers. Shot-peened parts. High cylindrical and roundness accuracy. Exacting tolerances provide low friction. Pre-stretched. Special alloy steel with extended riveted bushing "anti-kink" design. Highest quality non-O-ring chain in overall combined performance. Average tensile strength of 4,480 pounds. Includes clip-style master link. Note: Non-sealed chains require more regular maintenance than sealed (O-ring, X-ring) versions and are mainly recommended for off-road use.