The lowest price component in this Carburetor parts-list fiche is the Screw.
Some items from this specific schematic: Spring,throttle Valve, Plug, Jet,pilot, Gasket,float Cahmber (nas).
The Jr50 1997 (v) Usa Canada (e03 E28) Carburetor consists of thirty-six pieces with the Carburetor Assy being the most expensive.