Some items from this specific schematic: Set-crankcase, Screw-pan Head,6x14, Oil Seal, Push Rod, Bushing.
The lowest price component in this Crankcase ('80 D1) parts-list fiche is the Screw-cntsnk Hd,6x16.
The Screw-pan Head,6x30 is the most widely applied product in the KZ250D1 KZ250 1980 USA CANADA / MPH KPH CRANKCASE ('80 D1) ( eight times ).