PROX ENGINE VALVE EXHAUST STEEL

§ 01 / Part

ProX Steel Exhaust Valve 09260815 for Yamaha TT-R225 TT-R230 XT225 XT225S XT225W XT225WE YP250 YP250ABS YP250D YP250R

Fits 10 bikes
RRP £20.50 Save 20%
£16.40

incl. VAT

In stock — delivered in 6–10 working days

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

Part #: 09260815

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§ 02 / About this part

What it is

ProX steel exhaust valve to fit Yamaha TT-R225 (1999–2005); Yamaha TT-R230 (2005–2009, 2011–2026); Yamaha XT225 (1992–1998); Yamaha XT225S (1992–1995); Yamaha XT225W (1993–1996); Yamaha XT225WE (1997–1998); Yamaha YP250 (1998–2003); Yamaha YP250ABS (1999–2003); Yamaha YP250D (1998–2000); Yamaha YP250R (2005–2008).

This steel exhaust valve is a durable alternative to titanium, cross-referencing with OEM 5HO-12121-00. It sits in the exhaust port of the cylinder head. Steel valves offer a longer service life for riders who prioritise reliability over outright weight savings. They resist the extreme heat of the exhaust stroke better than many stock components. When fitting these to your bike, ensure your valve springs are rated for the additional weight of steel. Always lap the valve into the seat to ensure a perfect seal and restored compression during your top-end rebuild.

§ 03 / Specs

The numbers

Brand
PROX
Part number
09260815
Category
Top End
Weight
0.05 kg
OEM cross-refs
5HO-12121-00
VAT
20%

// Fitment

Will it fit your bike?

Fits 10 models · 11 year-bands

* 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.
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Free UK shipping over £100 ✦ 14-day no-quibble returns ✦ OEM-grade parts only ✦ UK support · Tue–Fri 9–5, Sat 9–4 ✦ Race-shop prices, paddock service ✦ Collection from Leeds by arrangement ✦
Free UK shipping over £100 ✦ 14-day no-quibble returns ✦ OEM-grade parts only ✦ UK support · Tue–Fri 9–5, Sat 9–4 ✦ Race-shop prices, paddock service ✦ Collection from Leeds by arrangement ✦