Kibblewhite Intake Stainless Valve & Spring Kit – Yamaha YFZ450 / YFZ450R/X / WR450F / YZ450F (2003–2009)

Upgrade your Yamaha’s valvetrain with this Kibblewhite stainless steel conversion kit, engineered for exceptional durability and performance. Designed to replace OEM titanium valves with long-life stainless components for up to 4× more runtime and reliability.

✅ What’s Included

• (2) Outer stainless intake valves – 3.040" length

• (1) Center stainless intake valve – 3.000" length

• (3) Titanium retainers

• (3) Valve springs

• (3) Base washers

• (3) Red Viton® valve stem seals

⚙️ Key Features & Benefits

• 4× Longer Lifespan: Stainless Black Diamond valves outlast OEM titanium

• Complete Conversion Kit: Everything needed to convert your head

• CNC-Precision Components: Titanium retainers + heat-treated springs

• Engineered for Reliability: Tested with FEA and proprietary cam/spring analysis

• Made in the USA: Race-proven design and manufacturing quality

📦 Compatibility

Fits the following Yamaha models:

• YFZ450 (2004–2009)

• YFZ450R (2009–2025)

• YFZ450X (2010–2011)

• WR450F (2003–2016)

• YZ450F (2003–2009)

🛡️ Warranty Info

Manufacturer-backed warranty included.
Professional installation recommended for best results.

💲 Price: $303.29 (Suggested Retail)
🔢 SKU: 0926-2739
🏷️ Brand: Kibblewhite