09104852 PISTON KIT FORGED STEEL PERFORMANCE REPLACEMENT / YAMAHA / SIZE +4,00

Name: WOSSNER PISTON KIT FORGED STEEL PERFORMANCE REPLACEMENT / YAMAHA / SIZE +4,00
Brand: WOSSNER
SKU: 09104852
Price: 100.67 GBP
Availability: InStock

Fits Yamaha YZ 125

£118.44 Save 15%

£100.67

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09104852

Authorised stockist

WOSSNER

14-day returns

Easy & hassle-free

Secure checkout

256-bit encryption

§ 02 / About this part

What it is

The WOSSNER PISTON KIT FORGED STEEL PERFORMANCE REPLACEMENT / YAMAHA / SIZE +4,00, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.

This forged component is designed for big-bore conversions and significant cylinder machining. It handles the extreme heat and pressure of high-revving race engines. This specific oversize requires a matched bore diameter to function correctly. Always check your ring end gap in the bore before assembly. Ensure the arrow on the crown points toward the exhaust port to avoid port snagging. Use fresh gaskets and a torque wrench for the head bolts. Regular replacement prevents skirt failure and maintains engine compression. This kit includes the rings, gudgeon pin, and circlips required for a complete top-end swap.

§ 03 / Specs

The numbers

Brand: WOSSNER
Part number: 09104852
Category: Top End
Weight: 0.20 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 125 2005–2017

* 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 — this is a UK shop for motocross, enduro, and trail-bike hard parts. All fitments live on the site, and listed against MX models KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is in the data, fully enriched to assist with accurate fitting and finding the right part for your bike quickly and easily. 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 & e-moto only. We operate from our huge storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. We have a RICH motorcycle history with multiple moto brands the images showing where we came from and our history, the business recently pivoted into hard parts and online retail.