On this parts fiche the Spacer,ignition C is the most specified component.
The Wire Harness is made up of components including this Reg.rect.assy which is the most expensive.
Parts such as the Wire Harness: Cap Assy High/y 1 (nas), Bolt,flange,6x35, Spacer,ignition C, Harness,wire are included in the Cbr500f 1991 (m) Austria Wire Harness parts fiche.