The eighteen Zx1000e9fa Ninja Zx10r 2009 Usa Crankshaft/piston(s) component parts are all listed in this schematic.
On this parts fiche the Nut,flanged,8mm is the most specified component.
The Crankshaft/piston(s) is made up of components including this Crankshaft-comp which is the most expensive.