Parts such as the Water Pump: Gasket 8.2x14x1 (nas), Shim, Screw, Seal,water Pump Shaft are included in the Rg125c 1987 (h) (e02 E04 E15 E17 E18 E30 E53) Water Pump parts fiche.
The Water Pump is made up of components including this Case, Water Pump which is the most expensive.