The component with the lowest price in the SEAT schematic is the Bolt, Flange(4my).
The Yamaha SEAT has five products enlisted in the schematic.
Parts such as the Seat: Semi-double Seat Assy, Bracket, Seat, Cover, Seat, Bolt, Flange(4my) are included in the Yz85 2003 (3) Usa Seat parts fiche.