Kibblewhite Lightweight Racing Valve Spring Kit – Yamaha YFZ450 / YFZ450R/X / WR450F / YZ450F

🛠️ Description
Handle high-RPM performance and big lift cams with confidence using the Kibblewhite Lightweight Racing Valve Spring Kit. Engineered from premium chromium-silicon alloy with CNC-machined titanium and heat-treated steel retainers, this kit provides the valvetrain stability needed for aggressive camshafts, turbocharged builds, and high-compression setups. Built in the USA, it ensures consistent pressure, reduced float, and reliable sealing under extreme loads.

✅ What’s Included

• 3x Intake Titanium Retainers

• 2x Exhaust Titanium Retainers

• 3x Intake CrSi Valve Springs

• 2x Exhaust CrSi Valve Springs

• 3x Intake H.T. Steel Basewashers

• 2x Exhaust H.T. Steel Basewashers

• 3x Intake Viton® Seals

• 2x Exhaust Viton® Seals

📦 Fitment

• 2010–2023 Yamaha YFZ450R SE

• 2010–2011 Yamaha YFZ450X

• 2009–2023 Yamaha YFZ450R

• 2008–2009 Yamaha YFZ450 X 4x2

• 2004–2009 Yamaha YFZ450

• 2003–2015 Yamaha WR450F

• 2003–2009 Yamaha YZ450F

🛡️ Warranty Info
Kibblewhite valve train components are backed by a limited manufacturer’s warranty against defects in materials and workmanship. Warranty does not cover race damage, improper installation, or tuning errors. Professional installation recommended.

🔑 Key Features

• Designed for high-lift camshafts up to 0.380"

• Compatible with turbocharged and boosted engines

• CNC-machined titanium and heat-treated steel retainers

• Chromium-silicon alloy dual springs for superior fatigue resistance

• Spring pressures: 39 lb (seat) / 86 lb (open)

• Lightweight racing design ensures reliable high-RPM control

• Made in the USA