The Wire Harness - Ignition Coil assembly is constructed from several parts from which the Rect.assy.,reg. is the most expensive.
Parts such as the Wire Harness - Ignition Coil: Band A2 Wire, Stay,regulator, Coil, Ignition, Bolt,flange 6x14 are included in the Cb250rs 1980 (a) England Wire Harness - Ignition Coil parts fiche.