The Crankshaft/piston(s) is made up of components including this Crankshaft-comp which is the most expensive.
Parts such as the Crankshaft/piston(s): Ring-set-piston Ll,o/, Coupling, O Ring,16mm, Bearing-small End are included in the Jh750-g2 Jetskixisport 1999 Usa Canada Crankshaft/piston(s) parts fiche.
In this schematic the "Ring-snap" is used most often.