Kibble White springs Valve conversion kitYAMAHA 250 YZ 250 F (CG40) - 2019Ref : KIBW00169A / 09263177

KIBBLEWHITE valve and spring kit designed for motocross intake applications. This stainless steel conversion kit includes the necessary components to switch to long-lasting Black Diamond intake valves: forged monoblock stainless steel valves, chrome-silicon wire springs, ultra-light titanium retainers, and hardened steel bases. The components are designed using finite element analysis (F.E.A.) software and proprietary camshaft analysis and spring design tools, then developed specifically for each application.

• Tulip angle: 18°
• Head diameter: 31.00 mm (1.220")
• Springs: outer spring with progressive winding, chrome-silicon wire
• Materials: forged stainless steel valves, titanium retainers, hardened steel bases
• Kit contents: 2x intake valves, 2x base washers, 2x springs, 2x titanium retainers
• Manufacturing: United States

The outer spring of the kit must be installed with the tightest end positioned on the thermally treated steel base washers. According to the manufacturer, this kit increases the longevity of the intake components compared to the original titanium parts. Ideal for motocross riders seeking durability and reliability on the track.

Manufacturer's ref: 80-82350 — Category: VALVES + PARTS — Universe: Cross — Compatible (example): YAMAHA YZ 250F (2019).