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

• Manufactured from Black Diamond™ Stainless Steel

• Nitrided surface for improved wear, corrosion resistance, and reduced friction

• One-piece forging for strength and durability

• Designed using Finite Element Analysis (FEA)

• Flow-tested profiles for efficient exhaust performance

Specifications

• Head Diameter: 30.50mm / 1.201"

• Stem Diameter: 5.47mm / 0.2155"

• Tulip Angle: 28 degrees

• Overall Length (OL): 85.85mm / 3.380"

• Standard size

Cross-Reference OEM Part Numbers

• Kibblewhite Part No. 80-80876

Vehicle Fitments

• Yamaha YZ 450 2014–2019

• Yamaha YZ 450FX 2016–2020

• Yamaha WR 450F 2016–2021