Kibblewhite Exhaust Valve Guide – Yamaha YFZ450 / YFZ450R/X / WR450F / YZ450F

🛠️ Description
Ensure long-lasting performance with the Kibblewhite C674 Bronze Exhaust Valve Guide. Precision-machined to exact KPMI® tolerances, this guide provides reliable sealing and proper valve alignment. Its softer manganese material makes it easy to ream and hone during installation, reducing prep time while maintaining dependable fit. Designed as a standard-size replacement for Yamaha 450 engines.

✅ What’s Included

• 1x Exhaust Valve Guide (C674 Bronze, 0.3957" OD)

📦 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 covered by a manufacturer’s limited warranty against defects in materials and workmanship. Warranty does not cover machining errors, improper installation, or race-related failure.

🔑 Key Features

• Precision-machined exhaust valve guide for Yamaha 450 models

• Made from C674 bronze for consistent sealing and valve stability

• Softer manganese construction for easy reaming and honing

• Exact OEM-size replacement (0.3957" OD / 0.1961" ID)

• Built to KPMI® tolerances for accuracy

• Made in the USA