Parts such as the E-4: Cam Shaft Comp,l, Arm,valve Rocker, Retainer,vlv Spg, Cotter,valve are included in the Gl1500ct Valkyrie Tourer 2000 (y) Japan Sc34-102 E-4 parts fiche.
In this schematic the "Cotter,valve" is used most often.
The component with the lowest price in the E-4 schematic is the Seat,valve Spring.