Some items from this specific schematic: Grommet(2gh), Hose, Oil 1, Spring, Compression (1j7), Bolt, Union (16g).
The most reasonably priced component used on the Xj900r Seca 1983 (d) Usa Oil Cooler is the Bolt.
The sub assemblies and components that make up this Oil Cooler include this Oil Cooler Assy, the most expensive part.