This fork neck cup set is used when installing a Big Twin or late Sportster 1 neck fork assembly on early Sportster models. Allows installation of Spring Forks with a 1 neck stem. Includes dust cover races installed and bearings Remove your existing cups and install these cups into your frame neck and you are ready to install any 1 neck stem fork assembly. *NOTE: Order related spacers and nuts separately. **NOTE: Spacers can be installed on the underside of the neck for added height. 1957-1977 XL 1937-1952 W 1937-1957 G
