On this parts fiche the Circlip,piston Pin is the most specified component.
A sample from the products for the Cylinder/piston include: Pin,dowel,10x8.2x14, Gasket,cylinder (nas), Ring-set-piston,std, Ring-o,od=18.5mm.
The Kawasaki CYLINDER/PISTON has twenty-three products enlisted in the schematic.