S&S Idle Mixture Screw with O-Ring Harley-Davidson U 1937-48

1938 Harley-Davidson Model U

1939 Harley-Davidson Model U

1940 Harley-Davidson Model U

1941 Harley-Davidson Model U

1942 Harley-Davidson Model U

1943 Harley-Davidson Model U

1944 Harley-Davidson Model U

1945 Harley-Davidson Model U

1946 Harley-Davidson Model U

1947 Harley-Davidson Model U

1948 Harley-Davidson Model U