Kibblewhite +1mm Stainless Valve Kit Fits Yamaha YFZ450R/X YFZ450 YZ450F WR450F
Kibblewhite +1mm Stainless Valve Kit Fits Yamaha YFZ450R/X YFZ450 YZ450F WR450F
Upgrade your Yamaha 450 engine with Kibblewhite !mm White Diamond Stainless Valves and RED Viton Seals. Fits YFZ450, YFZ450R, YZ450F, and WR450F models. Premium performance from BPRATV.
Yamaha YFZ450 / YFZ450R +1mm Kibblewhite White Diamond Stainless Valves & Seals Kit
🔥 Premium Oversize Valve Upgrade
Upgrade your engine with Kibblewhite White Diamond +1mm Stainless Steel Valves — the industry’s top-performing, race-ready valve solution. This complete 5-valve set delivers increased airflow, enhanced durability, and long-term reliability for Yamaha performance engines.
📦 What’s Included in This High-Performance Kit
Every kit includes premium U.S.A.-made components designed to outperform OEM parts at a fraction of the cost.
- Kibblewhite White Diamond +1mm Stainless Steel Intake & Exhaust Valves (All 5)
- Kibblewhite One-Piece Forged Valve Construction
- High Temp RED Viton Valve Stem Seals (Superior to OEM and non-Kibblewhite kits)
- Includes Genuine KPMI RED Viton Stem Seals (no bait-and-switch blues!).
- Direct OEM replacement for multiple Yamaha valve part numbers
- Designed for use with Kibblewhite Valve Springs (Part # 80-80206)
✅ Compatibility
Engineered to fit a wide range of Yamaha 450cc performance models. Full fitment list below:
- Yamaha YFZ450 (Carbureted) — 2004–2013
- Yamaha YFZ450R / YFZ450X (Fuel Injected) — 2009–2024
- Yamaha YZ450F — 2003–2009
- Yamaha WR450F — 2003–2015
❓ Frequently Asked Questions (FAQ)
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Q: Do these valves require machining?
A: Yes. Valve seats must be machined for proper installation. We offer this service — contact us for details.
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Q: Are the RED Viton valve seals included?
A: Yes. You will receive genuine Kibblewhite RED Viton stem seals, not generic non-Kibblewhite seals.
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Q: Are these valves stronger than OEM?
A: Absolutely — the White Diamond Stainless construction is significantly more durable and heat-resistant than stock.
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Q: Are Kibblewhite valve springs required?
A: Yes. These valves must be paired with Kibblewhite Springs Part # 80-80206 for correct performance and reliability.
🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. We supply only premium components like Kibblewhite to ensure your Yamaha 450 platform runs stronger, lasts longer, and performs at its peak. Trust BPRATV to keep your Yamaha YFZ450, YFZ450R, YFZ450X, YZ450F, and WR450F running at its best, every single time.
Boost your engine’s power and reliability — upgrade to Kibblewhite performance today!
BPRATV - The Best Parts. The Best Performance. The Best Price.
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NOTICE REGARDING PHOTOS: Product photos used in our listings are for example only to show the high quality of our components. You will receive the correct quantity, size, and fitment of bearings, titanium fasteners, nuts, and bolts for the specific kit listed.
BEARING NOTICE: In some cases, you may receive SEALED bearings. If your application requires an OPEN bearing, the seals can easily be removed.
EMISSIONS & RACE USE ONLY: This product is exempt from emission standards and requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code §§ 27156 and 38391]. Sold ONLY for use with EPA-certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing. Installation may void vehicle manufacturers' warranty and/or may be illegal in some locations.
WARRANTY & LIABILITY: © BPRATV LLC 1-year limited warranty from manufacturer for material/workmanship defects.* Due to the nature of high performance and racing, components are sold without express/implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not be liable for specific, incidental, or consequential damages (loss of property, equipment, profits, or revenue) resulting from sale, installation, or use of these parts. This product is NOT DIY; we strongly recommend work be done by a qualified, experienced mechanic.
RETURNS: Returns accepted within 30 days for items 100% complete, brand new, and in original packaging. Items installed or prepped (lubricated/sealed) are ineligible. For warranty consideration, parts MUST be sent back for physical inspection. No exceptions. We do not warranty based on photos, emails, or third-party assessments.
SPECIALTY WARRANTIES: Cub Cylinders: Lifetime warranty for original owner via BPRATV/Millennium Technologies inspection; covers cylinder only. Titanium Fasteners: Failure during use results in replacement only. Neither warranty covers improper tuning, installation, maintenance, or misuse.
INTERCHANGEABLE PARTS: We may substitute parts of equal quality from different manufacturers to prevent backorder delays. Prices and listings subject to change without notice.
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