The most reasonably priced component used on the Yz125 2000 5hd1 South Africa 105hd-100e1 Water Pump is the Circlip(53l).
Parts such as the Water Pump: Circlip(53l), Gear, Impeller Shaft, Cover, Housing, Bolt, Small Flange are included in the Yz125 2000 5hd1 South Africa 105hd-100e1 Water Pump parts fiche.
Check out any of the fifteen Water Pump components enlisted.