The component with the lowest price in the CYLINDER HEAD/CYLINDER schematic is the Nut,8mm.
Parts such as the Cylinder Head/cylinder: Bolt-flanged-small, Valve-assy-reed, Gear-spur,idle, Seal-oil,rso-5.5 11 4 are included in the Kdx250-d1 1991 United Kingdom Al Cylinder Head/cylinder parts fiche.
The most expensive part in this assembly is the Cylinder-engine.