Parts such as the Cilindro: Cylinder 1, O-ring(36y), Bolt, Socket, Gasket, Cylinder (nas) are included in the Xg250 2005 4d61 Italy 1d4d6-352s1 Cilindro parts fiche.
The Yamaha CILINDRO has four products enlisted in the schematic.
With a quantity of two pieces, the Bolt, Socket is the most used part in the CILINDRO diagram.