09260815 ENGINE VALVE EXHAUST STEEL

Name: PROX ENGINE VALVE EXHAUST STEEL
Brand: PROX
SKU: 09260815
Price: 16.51 GBP
Availability: InStock

Fits 10 bikes

RRP £20.64 Save 20%

£16.51

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09260815

Authorised stockist

PROX

14-day returns

Easy & hassle-free

Secure checkout

256-bit encryption

§ 02 / About this part

What it is

The PROX ENGINE VALVE EXHAUST STEEL, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

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
Weight: 0.05 kg
OEM cross-refs: 5HO-12121-00
VAT: 20%

// Fitment

Will it fit your bike?

Fits 10 models · 11 year-bands

Yamaha 11 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.