FDY Performance
VALVE EXHAUST YZ450F 14-16, KIBBLEWHITE 80-80876, Yamaha YZ 450 2014-2019 YZ 450FX 2016-2020 WR 450F 2016-2021
VALVE EXHAUST YZ450F 14-16, KIBBLEWHITE 80-80876, Yamaha YZ 450 2014-2019 YZ 450FX 2016-2020 WR 450F 2016-2021
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This Black Diamond™ Stainless Steel Exhaust Valve is designed for various Yamaha® YZ™ and WR™ 450 models from 2014 to 2021. Forged as a one-piece unit and treated with a specialised German nitriding process, it offers superior resistance to wear, corrosion, and friction. Developed using Finite Element Analysis and flow bench testing, this valve ensures consistent performance in high-demand off-road engine environments.
Features
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Manufactured from Black Diamond™ Stainless Steel
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Nitrided surface for improved wear, corrosion resistance, and reduced friction
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One-piece forging for strength and durability
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Designed using Finite Element Analysis (FEA)
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Flow-tested profiles for efficient exhaust performance
Specifications
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Head Diameter: 30.50mm / 1.201"
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Stem Diameter: 5.47mm / 0.2155"
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Tulip Angle: 28 degrees
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Overall Length (OL): 85.85mm / 3.380"
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Standard size
Cross-Reference OEM Part Numbers
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Kibblewhite Part No. 80-80876
Vehicle Fitments
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Yamaha YZ 450 2014–2019
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Yamaha YZ 450FX 2016–2020
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Yamaha WR 450F 2016–2021
FDY Performance – Engineered for riders who demand more.
At FDY Performance, we deliver precision-engineered motorcycle parts trusted by riders across the UK and beyond. Every component is tested for reliability, durability, and peak performance so you can ride harder, longer, and with confidence.
We’re not just a brand — we’re a movement built by riders, for riders. Whether you’re chasing podiums, upgrading your build, or maintaining your machine, FDY Performance keeps you on the road and at the top of your game.
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