Parts such as the Ignition: Condenser, Coil-ignition, Breaker Assy,contact, Screw-pan Head,6x10 are included in the Kz305a1 Csr 1981 Usa Ignition parts fiche.
The component with the lowest price in the IGNITION schematic is the Screw-pan-cros.
On this parts fiche the Nut-lock,6mm is the most specified component.
