The six Zx550a3 Gpz550 1986 Europe Uk Fr Fg Gr Crankcase Bolt Pattern component parts are all listed in this schematic.
Parts such as the Crankcase Bolt Pattern: Bolt,6x95, Bolt,6x55, Bolt,8x95, Bolt,6x40 are included in the Zx550a3 Gpz550 1986 Europe Uk Fr Fg Gr Crankcase Bolt Pattern parts fiche.
The Crankcase Bolt Pattern is made up of components including this Bolt,8x95 which is the most expensive.