The component with the lowest price in the METERS/IGNITION SWITCH/HEADLIGHT schematic is the Washer-spring,5mm.
Of all the components used in this assembly the Headlamp,unit is the most expensive.
With all the components that make up the KS125 1974 USA CANADA METERS/IGNITION SWITCH/HEADLIGHT assembly. The Bulb 6v 1.5w is the most frequently specified with four applications.