The component with the lowest price in the GASKET KIT B schematic is the Washer,plug,drain 12.
Parts such as the Gasket Kit B: Gasket,l Crankcas (mca), O-ring,54x2.4, Seat,oil Pump, Washer,plug,drain 12 are included in the Xr200r 1985 (f) South Africa Gasket Kit B parts fiche.