Of all the components used in this assembly the Crankcase Assy is the most expensive.
Parts such as the Crankcase: Screw (4h7), O-ring (1l9), Crankcase Assy, Bolt, Stud (22u) are included in the Xv535 1999 4yh9 Finland 294yh-300e1 Crankcase parts fiche.
In this schematic the "Bolt,socket" is used most often.