09102117 PISTON KIT PRO BB Ø 58.00 B

Name: VERTEX PISTON KIT PRO BB Ø 58.00 B
Brand: VERTEX
SKU: 09102117
Price: 134.3 GBP
Availability: InStock

Fits Yamaha YZ 125

RRP £167.88 Save 20%

£134.30

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09102117

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§ 02 / About this part

What it is

The VERTEX PISTON KIT PRO BB Ø 58.00 B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This B-size piston fits big-bore engine setups. It is slightly larger than the A-size to account for minor cylinder wear. Regular replacement prevents piston slap and maintains high compression. Measure your bore accurately to ensure the B-sizing provides the correct clearance. During installation, verify that the ring gaps are staggered according to the workshop manual. Lubricate the small-end bearing and gudgeon pin thoroughly. This kit contains the rings, pin, and circlips for your next engine service.

§ 03 / Specs

The numbers

Brand: VERTEX
Part number: 09102117
Weight: 0.20 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 125 2005–2019

* 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.