The Lock Washer is the cheapest item from this partsfiche.
The sixteen Gs650gt 1982 (z) (e01 E02 E04 E15 E16 E17 E18 E21 22 24 25 26 34 Air Cleaner component parts are all listed in this schematic.
This Case,air Cleaner,front is the most expensive of the items that make up this Air Cleaner assembly.