The 2nd Air assembly is constructed from several parts from which the Valve Assy,air Cut is the most expensive.
On this parts fiche the Bolt(6x16) is the most specified component.
A sample from the products for the 2nd Air include: Bracket,2nd Air Valve, Valve Assy,2nd Air Reed, Hose,2nd Air Valve,r, Hose,2nd Air Cleaner.