The most expensive part in this assembly is the Chamber-exhaust.
Parts such as the Muffler(s): Gasket,exhaust Pipe (nas), Cover-exhaust Pipe, Baffle, Chamber-exhaust are included in the Kdx50-a1 Kdx50 2003 Usa Canada Muffler(s) parts fiche.
On this parts fiche the Screw,5x6 is the most specified component.