On this parts fiche the Clamp,tube is the most specified component.
This Air Cleaner Assy is the most expensive of the items that make up this Air Cleaner ('80-'81 A1/a2) assembly.
The twenty-eight Kz550a1 1980 Usa Canada Air Cleaner ('80-'81 A1/a2) component parts are all listed in this schematic.