The Pin,dowel,10x8.2x14 is the lowest priced item on this Crankcase schematic.
Parts such as the Crankcase: Oil Seal,tb13225.5, O Ring,10mm, Nozzle,oil, Pin,dowel,12x14 are included in the Z305a3a Csr 1988 Europe Crankcase parts fiche.
Check out any of the eighteen Crankcase components enlisted.