Parts such as the Expansion Chamber (1): Washer,spg.,5mm, Rubber,silencer C, Body Comp,silence, Collar,silencer M are included in the Cr125r 1992 (n) Australia Expansion Chamber (1) parts fiche.
The component with the lowest price in the EXPANSION CHAMBER (1) schematic is the Washer,plain, 6mm.
On this parts fiche the Spring,ex.pipe is the most specified component.