A sample from the products for the Valve include: Retainer, Valve Spring, Spring, Valve Inner, Shaft, Rocker, Spring, Valve Outer.
The Yp250r 2007 1c04 Italy 1f1c0-352s1 Valve consists of sixteen pieces with the Arm, Valve Rocker being the most expensive.
In this schematic the "Cotter, Valve" is used most often.
