Parts such as the Ignition ('81 -'82 Kz750-e2/e3): Coil-igniton,#2&3, Coil-pulsing, Nut,6m/m, Washer-spring,6mm are included in the 190197 Ignition ('81 -'82 Kz750-e2/e3) parts fiche.
On this parts fiche the Cap-spark Plug,rtfm20 is the most specified component.
The most reasonably priced component used on the 190197 Ignition ('81 -'82 Kz750-e2/e3) is the Bolt-upset.