VALVE EXHAUST YZ450F 14-16, KIBBLEWHITE 80-80876, Yamaha YZ 450 2014-2019 YZ 450FX 2016-2020 WR 450F 2016-2021

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