The Bolt.hex.5x8 is the lowest priced item on this Cylinder Head schematic.
Parts such as the Cylinder Head: Spg,plunger, Dowel,pin,14x20, Dowel,pin,8x14, Bolt,flange,8x70 are included in the Xr650r 2003 (3) Australia / Ssw Cylinder Head parts fiche.
The Cylinder Head is made up of components including this Head Assy,cylinde which is the most expensive.