09100440 PISTON KIT FORGED 94.96MM B

Name: PROX PISTON KIT FORGED 94.96MM B
Brand: PROX
SKU: 09100440
Price: 158.74 GBP
Availability: InStock

Fits 3 bikes

RRP £198.43 Save 20%

£158.74

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09100440

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§ 02 / About this part

What it is

The PROX PISTON KIT FORGED 94.96MM B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

The B-grade option at 94.96mm, forged rather than cast, cross-referenced to Yamaha OEM 5TJ-11631-00. Pick it when a bore gauge reads a hundredth over standard; the extra 0.01mm keeps piston-to-wall clearance in tolerance without a replate. Fits the YZ 450 F, WR 450 F and Gas Gas EC 450 F. Forging takes the heat and detonation loads of a 450 top end better than cast. Rings, gudgeon pin and circlips in the box. Measure first, then order the grade.

§ 03 / Specs

The numbers

Brand: PROX
Part number: 09100440
Weight: 0.43 kg
OEM cross-refs: 5TJ-11631-00
VAT: 20%

// Fitment

Will it fit your bike?

Fits 3 models · 3 year-bands

Gas Gas 1 model

EC 450 F 2013–2015

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.