Parts such as the Valve(s): Shim,t=3.00, Shim,t=2.85, Shim,t=2.40, Spring-valve,intake,o are included in the Zx1200b3 Zx12r 2004 Usa California Canada Valve(s) parts fiche.
The lowest price component in this Valve(s) parts-list fiche is the Collet.
The Valve(s) assembly is constructed from several parts from which the Valve-exhaust is the most expensive.