The lowest price component in this Crankcase Cover parts-list fiche is the Pin.
Some items from this specific schematic: Bolt,cl.cover, Bolt, Gasket(5.8x11x1.2) (nas), Bolt,cl.cover.
This schematic depicts all components used in the Gsx600f Katana 1999 (x) Usa (e03) Crankcase Cover partslist.