The lowest price component in this Rear Hub parts-list fiche is the Washer-plain-small,8m.
Some items from this specific schematic: Sprocket-hub,51t,al, Sprocket-hub,52t, Circlip,42mm, Sprocket, Hub, 48t.
This schematic depicts all components used in the Kx450-fdf Kx450f 2013 Usa Rear Hub partslist.