Vertex Piston Kit Ø72.00 B 09103185 for Gas Gas EC 300 E RACING EC 300 NAMBOTIN EC 300 RACING EC 300 SIXDAYS EC300 EC300E EC300F Rieju MR300

Name: Vertex Piston Kit Ø72.00 B 09103185 for Gas Gas EC 300 E RACING EC 300 NAMBOTIN EC 300 RACING EC 300 SIXDAYS EC300 EC300E EC300F Rieju MR300
Brand: VERTEX
SKU: 09103185
Price: 166.76 GBP
Availability: InStock

Fits 8 bikes

RRP £208.45 Save 20%

£166.76

incl. VAT

In stock — delivered in 6–10 working days

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

Part #: 09103185

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§ 02 / About this part

What it is

Vertex piston kit Ø72.00 B to fit Gas Gas EC 300 E RACING (2014–2015); Gas Gas EC 300 NAMBOTIN (2009–2011); Gas Gas EC 300 RACING (2008–2015); Gas Gas EC 300 SIXDAYS (2009–2012); Gas Gas EC300 (2002–2014, 2018–2019); Gas Gas EC300E (2011–2014); Gas Gas EC300F (2013–2015); Rieju MR300 (2021).

This component is the primary wear item in your top-end. It sits within the cylinder bore and converts combustion into drive. Incremental sizing allows you to maintain tight tolerances as the cylinder plating wears over time. This B-size kit is for cylinders showing moderate wear. Regular replacement is essential for 2-stroke performance to prevent blow-by and lost compression. Check your bore size with a bore gauge to select the correct grade. Clean all carbon from the head and power valve before reassembly.

§ 03 / Specs

The numbers

Brand: VERTEX
Part number: 09103185
Category: Top End
Weight: 0.35 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 8 models · 9 year-bands

Gas Gas 8 models

Rieju 1 model

MR 300 2021

* 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.