The Bolt,flange,nshf, is the cheapest item from this partsfiche.
The twelve Xr650r 2001 (1) General Export / Kph Ssw Water Pump component parts are all listed in this schematic.
Some items from this specific schematic: Washer,sealing,6., Cover,water Pump, Bolt,flange,6x32, Brg Ball Radial 6.