The Sv650s 2006 (k6) Usa (e03) 2nd Air (model K3/k4/k5/k6) consists of thirteen pieces with the Valve Assy,air being the most expensive.
Some items from this specific schematic: Joint, Cover,2nd Air, Valve Assy,air Cut, Hose,2nd Air Valve Fr.
The most reasonably priced component used on the Sv650s 2006 (k6) Usa (e03) 2nd Air (model K3/k4/k5/k6) is the Clip.