The Crankcase assembly is constructed from several parts from which the Crankcase Comp R is the most expensive.
On this parts fiche the Bolt,flange Sh 6x65 is the most specified component.
Parts such as the Crankcase: Stud A, Cylinder, Bolt,flange,6x60, Bearing Needle 13, Stud B, Cylinder are included in the Z50j1 Monkey Japan Crankcase parts fiche.