Of all the components used in this assembly the Rectifier Assy.,r is the most expensive.
Parts such as the Wire Harness/ Ignition Coil: Bolt,flange,sh,6x16, Rectifier,silicon, Cushion,cdi Unit, Blade Fuse 20a are included in the Cb250 Nighthawk 1991 (m) Canada / Kph Wire Harness/ Ignition Coil parts fiche.
The component with the lowest price in the WIRE HARNESS/ IGNITION COIL schematic is the Bolt,flange,6x12.