The Shift Cam-fork is made up of components including this Shift Cam Assy which is the most expensive.
Parts such as the Shift Cam-fork: Fork, Shift 1, Pin, Dowel (409), Bolt (682), Pin,dowel (603) are included in the Xj900r Seca 1983 (d) Usa Shift Cam-fork parts fiche.
The Yamaha SHIFT CAM-FORK has fifteen products enlisted in the schematic.