Athena Forged Piston Kit 09103892 Ø53.96 mm for Yamaha YZ125 2005–2018, 2021

Name: Athena Forged Piston Kit 09103892 Ø53.96 mm for Yamaha YZ125 2005–2018, 2021
Brand: ATHENA
SKU: 09103892
Price: 98.09 GBP
Availability: InStock

Fits 1 bike

RRP £118.18 Save 17%

£98.09

incl. VAT

In stock — delivered in 6–10 working days

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

Part #: 09103892

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§ 02 / About this part

What it is

Athena forged piston kit Ø53.96 mm to fit Yamaha YZ125 (2005–2018, 2021).

Forged construction offers superior strength for high-revving 125cc engines. This kit replaces the stock unit to handle the rigours of race conditions. It sits within the top-end and dictates the engine's compression ratio. Replace your piston at the recommended hour interval to avoid fatigue. The forged material expands differently than cast, so adhere strictly to warm-up procedures. This kit includes the piston, rings, pin, and clips. Verify your cylinder bore measurement matches the 53.96mm specification. Always use a fresh base gasket during the rebuild process to ensure a proper seal.

§ 03 / Specs

The numbers

Brand: ATHENA
Part number: 09103892
Category: Top End
Weight: 0.26 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 2 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.