Parts such as the Gear Change Mechanism: Collar,return Spring, Lever-assy,change Sha, Spacer, Damper,change Pedal are included in the Kle650cbf Versys 2011 Usa Gear Change Mechanism parts fiche.
The Circlip-type-c,13mm is the cheapest item from this partsfiche.
The Kawasaki Gear Change Mechanism has twenty products enlisted in the schematic.