The lowest price component in this Fuel Tank parts-list fiche is the Gasket,6.4x11.5x0.8 (nas).
With two applications this Gasket,6.4x11.5x0.8 (nas) is the most specified part.
nineteen components are listed in the schematic for this Ksf400-a2 Kfx400 2004 Usa Fuel Tank .