The component with the lowest price in the CARBURETOR ('82-'83 KE175-D4/D5 schematic is the Screw-pan-cros.
On this parts fiche the Washer-spring,4mm is the most specified component.
This schematic depicts all components used in the Ke175-d4 Ke175 1982 Usa Canada Carburetor ('82-'83 Ke175-d4/d5 partslist.