Parts such as the Cylinder - Piston: Pin,knock 11x18, Ring Set,piston(s, Pin,piston, Gasket,cylinder (mca) are included in the Cb350k0 Super Sport France Cylinder - Piston parts fiche.
The most reasonably priced component used on the Cb350k0 Super Sport France Cylinder - Piston is the Clip,piston Pin.
On this parts fiche the Clip,piston Pin is the most specified component.