VALVE EXHAUST YZF400 426 98-02, KIBBLEWHITE 80-8057H
4.1 Trustpilot 99.9% positive on eBay
UK delivery £4.99, free over £60 2–4 business days
Spread the cost with 
18+, T&Cs apply
White Diamond Stainless Steel Exhaust Valve for Yamaha WR and YZ 400/426 models 1998-2002. CNC machined from a single forging of EV8 Stainless Steel with high heat and corrosion resistance. Features a high-quality hard chrome finish applied via a 360-degree anode process for consistent durability. Developed using Finite Element Analysis and tested for flow efficiency to support reliable exhaust performance. Head Diameter: 28.00mm / 1.102". Stem Diameter: 5.00mm / 0.1955". Tulip Angle: 25 degrees. Overall Length (OL): 81.85mm / 3.220". Standard size. Kibblewhite Part No. 80-8057H.
- SKU
- 65-496.KW.SS
- Brand
- Kibblewhite
- Availability
- In Stock (6)
Fitments (16)
| Make | Model | Year |
|---|---|---|
| YAMAHA | WR 400F | 1998 |
| YAMAHA | WR 400F | 1999 |
| YAMAHA | WR 400F | 2000 |
| YAMAHA | WR 426F | 2000 |
| YAMAHA | WR 426F | 2001 |
| YAMAHA | WR 426F | 2002 |
| YAMAHA | YZ 400F | 1998 |
| YAMAHA | YZ 400F | 1999 |
| YAMAHA | YZ 400F | 2000 |
| YAMAHA | YZ 426F | 2000 |
| YAMAHA | YZ 426F | 2001 |
| YAMAHA | YZ 426F | 2002 |
| YAMAHA | YZ 450F | 2010 |
| YAMAHA | YZ 450F | 2011 |
| YAMAHA | YZ 450F | 2012 |
| YAMAHA | YZ 450F | 2013 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve - Exhaust
- Variant Id
- 264021
FULL DESCRIPTION
Kibblewhite White Diamond® Stainless Steel Exhaust Valve
This premium exhaust valve is expertly CNC machined from a single forging of EV8 Stainless Steel, ensuring superior strength and durability. Engineered for high-performance applications, it offers exceptional resistance to both heat and corrosion, making it ideal for demanding riding conditions. The valve features a high-quality hard chrome finish, meticulously applied through a 360-degree anode process to guarantee a uniform and long-lasting coating.
Developed using advanced Finite Element Analysis (FEA) and rigorously tested for flow efficiency on a computerized flow bench, this exhaust valve is optimized to support reliable exhaust performance. For optimal results and reliability, it is recommended for use with Kibblewhite valve spring kits (Part No. 65-724).
Key Features:
- CNC machined from a one-piece EV8 Stainless Steel forging
- Excellent heat and corrosion resistance
- Durable hard chrome finish with 360-degree anode coating
- Finite Element Analysis (FEA) design
- Flow-optimized profile tested for efficiency
- Standard size
Specifications:
- Head Diameter: 28.00mm / 1.102"
- Stem Diameter: 5.00mm / 0.1955"
- Tulip Angle: 25 degrees
- Overall Length (OL): 81.85mm / 3.220"
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.