The component with the lowest price in the CRANKCASE schematic is the Pin,dowel,10x8.2x14.
On this parts fiche the Screw-pan Head,6x50 is the most specified component.
A sample from the products for the Crankcase include: Bearing-ball,#6205c3, Bolt, Clutch Spr Fitt, Stud,10x65, Holder,clutch Cable.