The most expensive part in this assembly is the Crank Cylinder Assy.
On this parts fiche the Bolt, With Washer (6h4) is the most specified component.
Parts such as the Crankcase - Cylinder: Bolt, With Washer (682), Crank Cylinder Assy, Plug, Straight Screw (688), Crankcase Assy are included in the Pro 50h 1987 Crankcase - Cylinder parts fiche.
