S&S Rocker Arms and Shafts

The V-Twin engines later known as "Knuckleheads" were the first production Harleys with valves in the cylinder head. From the mid-1930s to the late 1940s, they were the fastest American production motorcycles. Since the earliest examples are now around 90 years old, good replacement parts are rare. This also applies to rocker arms and their shafts. Because both usually wear out equally, these parts are available for Knuckleheads as a set from S&S.

These very high-quality components are installed by S&S in the KN series engines, but they also fit original Knucklehead engines (rocker arm ratio 1:1). Each complete set consists of 4 rocker arms, shafts, washers, spacers, and special O-rings. The shafts are also available separately, but they are not compatible with the original rocker arms.