On this parts fiche the Bolt(6x50) is the most specified component.
The most reasonably priced component used on the Sv650 2000 (y) Usa (e03) Water Pump (model K1/k2) is the Gasket 8.2x14x1 (nas).
This Pump Assembly,water is the most expensive of the items that make up this Water Pump (model K1/k2) assembly.