The Gasket(8.2x14x1) (nas) is the lowest priced item on this Crankcase schematic.
Parts such as the Crankcase: Bolt, Gasket,crankca (nas), Valve Assy,reed, Crankcase Set are included in the Rm85 2005 (k5) Usa (e03) Crankcase parts fiche.
The Crankcase is made up of components including this Crankcase Set which is the most expensive.