The component with the lowest price in the AIR CLEANER schematic is the Screw,tapping,4x8.
The Air Cleaner is made up of components including this Case Comp., Air/c which is the most expensive.
Parts such as the Air Cleaner: Tube,r.connecting, Separator A, Plate,battery, Screw,pan,4x8 are included in the Cx500c Custom 1980 (a) Denmark Air Cleaner parts fiche.