Parts such as the Cylinder Head/cylinder: Nut,8mm, Gasket-cyl Head Plug (nas), Nut Cylinder Head, Cylinder Head,f.black are included in the Kx400 1975 Usa Cylinder Head/cylinder parts fiche.
The Washer-spring,14mm is the lowest priced item on this Cylinder Head/cylinder schematic.
Of all the components used in this assembly the Cylinder,f.black is the most expensive.