Vertex Piston Kit Ø92.00 A 09101902 for Yamaha WR400F 1998–2001 YZ400F 1998–1999

Name: Vertex Piston Kit Ø92.00 A 09101902 for Yamaha WR400F 1998–2001 YZ400F 1998–1999
Brand: VERTEX
SKU: 09101902
Price: 171.6 GBP
Availability: InStock

Fits 2 bikes

RRP £214.50 Save 20%

£171.60

incl. VAT

In stock — delivered in 6–10 working days

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

Part #: 09101902

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§ 02 / About this part

What it is

Vertex piston kit Ø92.00 A to fit the Yamaha WR400F, model years 1998–2001, and Yamaha YZ400F, model years 1998–1999.

This replica kit matches the original factory specifications for your bike. It serves as a direct swap for the OEM unit. The piston sits in the top-end and maintains the stock compression ratio and power delivery. Replace this during your scheduled top-end service to prevent loss of performance. The kit comes with the piston, rings, wrist pin, and circlips. Measure your bore to ensure you have the correct sizing for your current cylinder wear. Clean all carbon from the head during the install.

§ 03 / Specs

The numbers

Brand: VERTEX
Part number: 09101902
Category: Top End
Weight: 0.42 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 2 models · 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.