Some items from this specific schematic: Washer, O Ring(d:3,id:23), Lens Set,oil Inspection, Gasket,oil Tank Filler Cap (nas).
This FRAME - FRAME LEFT COVER - OIL TANK - OIL TANK OUTLET - AIR INFL assembly utilises three Washer,lock(s) - the highest specified component.
The sub assemblies and components that make up this Frame - Frame Left Cover - Oil Tank - Oil Tank Outlet - Air Infl include this Cap,oil Tank, the most expensive part.