The component with the lowest price in the THERMOSTAT schematic is the Bolt,flange,sh,6x25.
Parts such as the Thermostat: O-ring C Case, Bolt,flange,sh,6x25, Thermo Unit Assy, Thermostat Assy. are included in the Cbr600f Hurricane 1994 (r) Germany / Kph 50p Thermostat parts fiche.
The most expensive part in this assembly is the Thermo Unit Assy.