Parts such as the Thermostat: Thermostat Assy., O-ring,47.5x2, Cover,thermostat, Bolt,flange,6x22 are included in the Cbr900rr Fireblade 1996 (t) Germany Thermostat parts fiche.
On this parts fiche the Bolt,flange,6x22 is the most specified component.
The Thermostat assembly is constructed from several parts from which the Thermo Unit Assy is the most expensive.