Parts such as the Valve(s): Shim,t=3.25, Tappet, Retainer-valve Spring, Shim,t=3.00 are included in the Er650caf Er6n 2010 Usa Valve(s) parts fiche.
The Collet is the cheapest item from this partsfiche.
Check out any of the twenty-nine Valve(s) components enlisted.