🛠️ YFZ450 / YFZ450R Head Rebuild Kit – Kibblewhite Valves, Springs, Tappets

Maximize power and reliability with this complete head rebuild kit for all Yamaha YFZ450 and YFZ450R models—carbureted and fuel-injected. Built with Kibblewhite USA performance components, this bolt-on setup is perfect for race or aggressive recreational use.

No machining required. Works with pistons designed for pump or race gas.

✅ What’s Included:

• Kibblewhite Chrome Silicone Valve Springs

• Kibblewhite Titanium Retainers

• Kibblewhite Heat-Treated Spring Collars

• Kibblewhite White Diamond Stainless Steel Valves (Intake & Exhaust)

• Kibblewhite Viton Valve Stem Seals

• Kibblewhite Bronze Valve Guides

• Valve Keepers

• Aftermarket Valve Buckets / Tappets

📦 Fitment:

Fits all Yamaha YFZ450, YFZ450R, and YFZ450X models & years:

• YFZ450 (2004–2013)

• YFZ450R / RSE / RW (2009–2022)

• YFZ450X (2010–2011)

• Also compatible with many WR450F, YZ450F, YZ450FX models (2003–2021)

🛡️ Warranty Info:

All Kibblewhite components carry a 90-day manufacturer warranty against defects. No warranty against failure from improper install or tuning.