09031016 ENGINE BOTTOM END YAMAHA REBUILD KIT

Name: VERTEX ENGINE BOTTOM END YAMAHA REBUILD KIT
Brand: VERTEX
SKU: 09031016
Price: 520.23 GBP
Availability: InStock

Fits Yamaha YZ 125

RRP £650.29 Save 20%

£520.23

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09031016

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§ 02 / About this part

What it is

The VERTEX ENGINE BOTTOM END YAMAHA REBUILD KIT, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

Refresh the rotating assembly with this kit. It addresses the crankshaft, main bearings, and seals deep inside the cases. Bottom-end wear usually manifests as excessive big-end play or oil seal failure. These components are vital for maintaining structural integrity and smooth power delivery. Each kit includes a crankshaft, main bearings, and a gasket set for splitting and resealing the cases. Fitment is model-specific to ensure correct oil-way alignment and crank balance. Ensure your cases are clean and mating surfaces are flat before installation. It restores your bike to factory tolerances for demanding race or trail use.

§ 03 / Specs

The numbers

Brand: VERTEX
Part number: 09031016
Weight: 4.66 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

Yamaha YZ 125 2005–2020

* 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.