The component with the lowest price in the CRANKCASE schematic is the Screw (4h7).
Parts such as the Crankcase: Plate, Bearing Cover, Crankcase Assy, Screw (4h7), O-ring (1l9) are included in the Xvs650 1999 4vr7 Portugal 194vr-300e1 Crankcase parts fiche.
Of all the components used in this assembly the Crankcase Assy is the most expensive.