ProX Exhaust Valve and Spring Kit 09261455 for Gas Gas EC 250 4T EC 250 RACING EC 250 SIXDAYS EC250 EC250E EC250F EC300F Yamaha WR250F YZ250F

Name: ProX Exhaust Valve and Spring Kit 09261455 for Gas Gas EC 250 4T EC 250 RACING EC 250 SIXDAYS EC250 EC250E EC250F EC300F Yamaha WR250F YZ250F
Brand: PROX
SKU: 09261455
Price: 114.35 GBP
Availability: InStock

Fits 9 bikes

RRP £142.94 Save 20%

£114.35

incl. VAT

In stock — delivered in 6–10 working days

Dispatched in 2–3 working days · delivered in 6–10.

Part #: 09261455

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§ 02 / About this part

What it is

ProX exhaust valve and spring kit to fit Gas Gas EC 250 4T (2010–2011); Gas Gas EC 250 RACING (2010–2011); Gas Gas EC 250 SIXDAYS (2010–2011); Gas Gas EC250 (2010–2011); Gas Gas EC250E (2011); Gas Gas EC250F (2012–2015); Gas Gas EC300F (2013–2015); Yamaha WR250F (2001–2013); Yamaha YZ250F (2001–2013).

This kit replaces the critical exhaust components in your cylinder head during a top-end rebuild. Extreme heat causes valve faces to cup and springs to lose their tension over time. This leads to poor sealing and lost compression. This kit includes steel valves and matched heavy-duty springs to restore factory performance. Steel components offer increased durability for enduro and trail use compared to standard titanium. Ensure your valve seats are professionally cut or checked for a perfect seal before installation. Always fit new stem seals to prevent oil consumption.

§ 03 / Specs

The numbers

Brand: PROX
Part number: 09261455
Category: Top End
Weight: 0.09 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 9 models · 9 year-bands

Gas Gas 7 models

Yamaha 2 models

* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.

§ 05 / About Iron Offroad

Iron Offroad

Iron Offroad is the off-road sibling of Iron City and Iron Stable — a UK shop for motocross, enduro, and trail-bike hard parts. Every fitment lives on the site, listed against KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is the data: fully enriched fitment so you find the right part for your bike quickly and get it fitted accurately. Brands you'd find on a paddock workbench — pads, sprockets, plastics, fork seals, cables, gaskets, bars, the things that actually wear out. Road-bike kit, scooter parts, and quad gear sit elsewhere; dirt and e-moto only. We operate from our storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. The business has a rich motorcycle history across multiple moto brands — the photos show where we came from — and recently pivoted into hard parts and online retail.