The most reasonably priced component used on the Gs650g 1983 (d) Usa (e03) Muffler is the Lock Washer.
Some items from this specific schematic: Clamp,muffler Connector,r, Muffler Assembly, Cover,muffler,right, Connector,muffler.
This schematic depicts all components used in the Gs650g 1983 (d) Usa (e03) Muffler partslist.