09310024 CYLINDER KIT 290cc 83mm BIG BORE

Name: ATHENA CYLINDER KIT 290cc 83mm BIG BORE
Brand: ATHENA
SKU: 09310024
Price: 505.33 GBP
Availability: InStock

Fits 2 bikes

RRP £608.83 Save 17%

£505.33

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09310024

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§ 02 / About this part

What it is

The ATHENA CYLINDER KIT 290cc 83mm BIG BORE, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This big bore kit increases displacement for a significant torque gain. It replaces your stock cylinder and piston assembly. The larger bore requires specific jetting or mapping changes to suit the increased airflow. It sits at the heart of your top-end rebuild. The kit includes all necessary gaskets and hardware for the conversion. Expect a broader powerband and more grunt out of corners. Verify your crank and rod are within spec before adding the extra load of a big bore. This is a performance-focused upgrade for serious trail or track use.

§ 03 / Specs

The numbers

Brand: ATHENA
Part number: 09310024
Weight: 1.55 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 2 models · 2 year-bands

* 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.