The thirty A100-4 1978 (c) General Export (e01) Cylinder - Crankcase component parts are all listed in this schematic.
Parts such as the Cylinder - Crankcase: Gasket,cylinder (mca), Bolt 8x110, Gasket,cylinder Head (nas), Screw (6x45) are included in the A100-4 1978 (c) General Export (e01) Cylinder - Crankcase parts fiche.
The component with the lowest price in the CYLINDER - CRANKCASE schematic is the Nut (8mm).