The Bolt,recessed,6x1 is the lowest priced item on this E-4 schematic.
Parts such as the E-4: Wash,sealing,7mm, Oil Seal,12x22x5, Cover,water Pump, Impeller,water/p are included in the Cr125r 2003 (3) Japan Je01-197 E-4 parts fiche.
The E-4 assembly is constructed from several parts from which the Gear Comp,water P is the most expensive.