The Cylinder/piston assembly is constructed from several parts from which the Cylinder-engine is the most expensive.
In this schematic the "Nut,cap,8mm,black" is used most often.
Parts such as the Cylinder/piston: Piston-engine Ll,o/s, Ring-snap, Pin-piston, Ring-o are included in the Kl650a3 Klr650 1989 Usa California Canada Cylinder/piston parts fiche.