The O-ring (2h9) is the lowest priced item on this Crankcase Cover 1 schematic.
Some items from this specific schematic: Plate, Pin, Dowel(3vd), Bolt, Flange(2uj), Bolt, Small Flange.
This schematic depicts all components used in the Xg250 2005 4d61 Holland 1d4d6-351f1 Crankcase Cover 1 partslist.