On this parts fiche the Bolt,flange,6x10 is the most specified component.
twenty-seven components are listed in the schematic for this Crf450x 2011 (b) Australia / Type 2 Hb Exhaust Muffler .
Some items from this specific schematic: Bolt,sh Dr 8x18, Joint Band,muffle, Pipe Comp,exh., Rubber,side Cover.