On this parts fiche the Cotter Valve is the most specified component.
The Dr-z70 2009 (k9) Usa (e03) Drz70 Dr Z70 Camshaft - Valve consists of seventeen pieces with the Camshaft Assy being the most expensive.
A sample from the products for the Camshaft - Valve include: Washer,sprocket, Retainer,valve Spring, Shaft,valve Rocker Arm Intake, Cotter Valve.