The Bolt,flange,nshf, is the cheapest item from this partsfiche.
The Water Pump assembly is constructed from several parts from which the Pump Assy,water is the most expensive.
Parts such as the Water Pump: Oil Seal,12x22x5, O-ring 32.95x2.62, Cover,water Pump, Bolt,flange,nshf, are included in the Xr650r 2002 (2) Canada / Ref Water Pump parts fiche.