The most reasonably priced component used on the Xg250 2005 4d62 Greece 1d4d6-300e1 Crankcase Cover 1 is the O-ring (2h9).
The Yamaha CRANKCASE COVER 1 has thirty products enlisted in the schematic.
Parts such as the Crankcase Cover 1: Gasket 256113960000 (nas), Bolt, Flange(4kg), O-ring (341), O-ring (646) are included in the Xg250 2005 4d62 Greece 1d4d6-300e1 Crankcase Cover 1 parts fiche.