On this parts fiche the Washer, Protecter is the most specified component.
Parts such as the Exhaust System: Bolt(2kf), Washer, Wave(3rw), Screw, Bind(1jk), Nut,self-locking (2ek) are included in the Xt600e 1990 3tb1 France 203tb-351f1 Exhaust System parts fiche.
The sub assemblies and components that make up this Exhaust System include this Muffler 1, the most expensive part.