In this schematic the "Damper" is used most often.
The most reasonably priced component used on the Xg250 2005 4d61 Portugal 1d4d6-351f1 Rear Wheel is the Washer, Plate.
Parts such as the Rear Wheel: Oil Seal(4da), Washer, Plate, Nut, Self-locking (8bf), Damper are included in the Xg250 2005 4d61 Portugal 1d4d6-351f1 Rear Wheel parts fiche.