The Circlip,ex. 15mm is the lowest priced item on this Brake Pedal/change Pedal schematic.
Parts such as the Brake Pedal/change Pedal: Sw Assy,rear Stop, Rubber,dust Seal, Bolt,flange,6x20, Oil Seal are included in the Cbr1000f 1997 (v) European Direct Sales Brake Pedal/change Pedal parts fiche.
On this parts fiche the Rubber,dust Seal is the most specified component.