In this schematic the "Pin, Dowel (26h)" is used most often.
Parts such as the Shift Cam - Fork: Screw, Countersunk (5h0), Shift Cam Assy, Fork, Shift 3, Spring Compression278185450000 are included in the Xvz12d Venture Royale 1989 (k) Usa Shift Cam - Fork parts fiche.
The component with the lowest price in the SHIFT CAM - FORK schematic is the Pin, Dowel (26h).