Wiseco Piston Kit Pro-Lite 804M06640 for Yamaha YZ250 1999–2014

Name: Wiseco Piston Kit Pro-Lite 804M06640 for Yamaha YZ250 1999–2014
Brand: WISECO
SKU: 804M06640
Price: 135.78 GBP
Availability: InStock

Fits Yamaha YZ 250

RRP £169.73 Save 20%

£135.78

incl. VAT

In stock — delivered in 6–10 working days

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

Part #: 804M06640

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§ 02 / About this part

What it is

Wiseco piston kit Pro-Lite to fit the Yamaha YZ250, model years 1999–2014.

This forged unit is engineered for high-performance top-end refreshes. It replaces the stock piston to offer better durability under race conditions. You should swap this out at the recommended service interval to avoid loss of power or potential engine damage. The kit comes complete with rings, gudgeon pin, and circlips. Verify your cylinder bore size and condition before ordering to ensure the correct tolerance. During the rebuild, pay close attention to ring orientation and end gap. This part is essential for maintaining the mechanical integrity and throttle response of your bike.

§ 03 / Specs

The numbers

Brand: WISECO
Part number: 804M06640
Category: Top End
Weight: 0.32 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 250 1999–2014

* 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.