The component with the lowest price in the IGNITION COIL-BATTERY -REGULATOR schematic is the Spg/washer,6mm.
Some items from this specific schematic: Battery 55b24r(s), Battery, Condenser.comp, Washer,spg.,5mm.
With a quantity of six pieces, the Plug, Vent is the most used part in the IGNITION COIL-BATTERY -REGULATOR diagram.