The most reasonably priced component used on the Fzr600r (72.1kw 1995 4jh6 Germany 254jh-332g2 Water Pump is the Bolt, Flange(4my).
In this schematic the "Bolt,socket" is used most often.
The Water Pump assembly is constructed from several parts from which the Water Pump Assy (o-ring) is the most expensive.