VALVE EXHAUST YZ250F 14-18, KIBBLEWHITE 80-80916
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
This Black Diamond stainless steel exhaust valve is precision engineered from a one-piece forging and features a black nitrided surface treatment for superior wear resistance and reduced friction. Each valve undergoes advanced design and testing processes to ensure consistent flow performance and durability. It is manufactured from Black Diamond stainless steel with a black nitrided coating for enhanced wear and corrosion resistance. The one-piece forging provides strength and longevity. Designed using Finite Element Analysis (FEA), it has flow-tested profiles for optimized exhaust efficiency. Installation requires the use of KPMI Spring Kit #80-81400. Specifications include a 25.00mm head diameter, 4.5mm stem diameter, 30-degree tulip angle, and 82.30mm overall length. This is a standard size valve.
- SKU
- 65-5014.KW.SS
- Brand
- Kibblewhite
- Availability
- In Stock (6)
Fitments (44)
| Make | Model | Year |
|---|---|---|
| FANTIC | XEF 250 | 2021 |
| FANTIC | XEF 250 | 2022 |
| FANTIC | XEF 250 | 2023 |
| FANTIC | XEF 250 | 2024 |
| FANTIC | XEF 310 | 2024 |
| FANTIC | XXF 250 | 2022 |
| FANTIC | XXF 250 | 2023 |
| FANTIC | XXF 250 | 2024 |
| YAMAHA | WR 250F | 2014 |
| YAMAHA | WR 250F | 2015 |
| YAMAHA | WR 250F | 2016 |
| YAMAHA | WR 250F | 2017 |
| YAMAHA | WR 250F | 2018 |
| YAMAHA | WR 250F | 2019 |
| YAMAHA | WR 250F | 2020 |
| YAMAHA | WR 250F | 2021 |
| YAMAHA | WR 250F | 2022 |
| YAMAHA | WR 250F | 2023 |
| YAMAHA | WR 250F | 2024 |
| YAMAHA | WR 250F | 2025 |
| YAMAHA | YZ 250F | 2014 |
| YAMAHA | YZ 250F | 2015 |
| YAMAHA | YZ 250F | 2016 |
| YAMAHA | YZ 250F | 2017 |
| YAMAHA | YZ 250F | 2018 |
| YAMAHA | YZ 250F | 2019 |
| YAMAHA | YZ 250F | 2020 |
| YAMAHA | YZ 250F | 2021 |
| YAMAHA | YZ 250F | 2022 |
| YAMAHA | YZ 250F | 2023 |
| YAMAHA | YZ 250F | 2024 |
| YAMAHA | YZ 250F | 2025 |
| YAMAHA | YZ 250FX | 2014 |
| YAMAHA | YZ 250FX | 2015 |
| YAMAHA | YZ 250FX | 2016 |
| YAMAHA | YZ 250FX | 2017 |
| YAMAHA | YZ 250FX | 2018 |
| YAMAHA | YZ 250FX | 2019 |
| YAMAHA | YZ 250FX | 2020 |
| YAMAHA | YZ 250FX | 2021 |
| YAMAHA | YZ 250FX | 2022 |
| YAMAHA | YZ 250FX | 2023 |
| YAMAHA | YZ 250FX | 2024 |
| YAMAHA | YZ 250FX | 2025 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve - Exhaust
- Variant Id
- 292866
FULL DESCRIPTION
Kibblewhite Black Diamond Stainless Steel Exhaust Valve
This Black Diamond™ Stainless Steel Exhaust Valve is precision engineered for optimal performance and durability. Manufactured from a one-piece forging, it features a robust construction designed to withstand the demands of high-performance engines.
The advanced black nitrided surface treatment offers superior wear resistance and reduced friction, ensuring smooth operation and extended component life. Each valve undergoes rigorous design and testing processes, including Finite Element Analysis (FEA) and flow-tested profiles, to guarantee consistent flow performance and enhanced exhaust efficiency.
Key Features:
- Constructed from durable Black Diamond™ Stainless Steel.
- Features a black nitrided coating for enhanced wear and corrosion resistance.
- One-piece forging provides exceptional strength and longevity.
- Designed using Finite Element Analysis (FEA) for precision engineering.
- Flow-tested profiles optimize exhaust efficiency.
- This valve requires the use of KPMI® Spring Kit #80-81400 for proper installation.
Specifications:
- Head Diameter: 25.00mm / 0.984"
- Stem Diameter: 4.5mm / 0.1760"
- Tulip Angle: 30 degrees
- Overall Length (OL): 82.30mm / 3.240"
- Standard size.
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.