09104285 PISTON KIT TOP END Ø 54.00 A

Name: VERTEX PISTON KIT TOP END Ø 54.00 A
Brand: VERTEX
SKU: 09104285
Price: 127.63 GBP
Availability: InStock

Fits Yamaha YZ 125

RRP £159.54 Save 20%

£127.63

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09104285

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§ 02 / About this part

What it is

The VERTEX PISTON KIT TOP END Ø 54.00 A, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This A-size top-end kit is the standard replacement for a fresh cylinder. It sits in the bore and includes the piston, rings, pin, and circlips. Maintaining the correct piston-to-wall clearance is essential for engine health. Replace this kit at the hour intervals specified in your manual to prevent performance loss. Measure your bore to ensure it is within the A-size specification. Check the ring end gap before fitting. Ensure the piston is oriented correctly and the circlips are fully locked in their grooves. Lubricate the small-end bearing and pin during the rebuild of your bike.

§ 03 / Specs

The numbers

Brand: VERTEX
Part number: 09104285
Weight: 0.39 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 125 2002–2004

* 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.