Parts such as the Muffler: Bolt,flanged,6x20, Muffler Body,flat Black, O Ring,36mm, Exhaust Pipe are included in the Kdx80-a2 Kdx80 1981 Austria Muffler parts fiche.
In this schematic the "Washer,7x16x1.2" is used most often.
The most expensive part in this assembly is the Muffler Body,flat Black.