FDY Performance
VALVE EXHAUST YZF250 01-13, 5NL-12121-10-00, 80-80077
VALVE EXHAUST YZF250 01-13, 5NL-12121-10-00, 80-80077
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This exhaust valve is designed as a direct OEM replacement for Yamaha WR and YZ 250F models from 2001 to 2013. Constructed from Black Diamond™ stainless steel and treated with a proprietary nitriding process, it delivers increased wear resistance, reduced friction, and superior durability under high-performance conditions. KPMI recommends pairing this valve with Kibblewhite® lightweight valve spring kits for optimal performance and longevity.
Features
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Manufactured from one-piece forged Black Diamond™ stainless steel
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Nitrided surface treatment for improved wear resistance and reduced friction
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Designed using Finite Element Analysis and flow bench tested for optimal performance
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Compatible with Kibblewhite® lightweight valve spring kits
Specifications
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Valve Type: Exhaust
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Material: Black Diamond™ Stainless
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Coating: Black Nitroneg
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Quantity: 1
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Head Diameter: 24.50 mm / 0.965"
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Stem Diameter: 4.5 mm / 0.1758"
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Tulip: 25º
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Overall Length: 3.070"
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Remarks: Standard
Cross-Reference OEM Part Numbers
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Kibblewhite 80-80077
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PSYCHIC XU-09519E
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Vertex 8400005-1
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Wiseco VET005
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Yamaha 5NL-12121-10-00
Vehicle Fitments
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Yamaha WR250F (2001–2013)
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Yamaha YZ250F (2001–2013)
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2003 WR250F - WR250FR VALVE
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2003 YZ250F - YZ250FR VALVE
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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