Parts such as the Oil Pump/oil Filter ('81 B2): Spring, Cover,oil Filter, O Ring,90mm, Screw-pan Head,6x25 are included in the Kz440b2 1981 Usa / Mph Oil Pump/oil Filter ('81 B2) parts fiche.
Of all the components used in this assembly the Oil Pump Assy is the most expensive.
The lowest price component in this Oil Pump/oil Filter ('81 B2) parts-list fiche is the Pin-dowel,6x12.