09103438 PISTON KIT ALUMINUM 55.95MM B

Name: PROX PISTON KIT ALUMINUM 55.95MM B
Brand: PROX
SKU: 09103438
Price: 110.6 GBP
Availability: InStock

Fits 2 bikes

RRP £138.25 Save 20%

£110.60

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09103438

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§ 02 / About this part

What it is

The PROX PISTON KIT ALUMINUM 55.95MM B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This aluminum piston kit is the standard for your top-end service. It sits in the cylinder bore to convert combustion into mechanical energy. The B-size option allows you to match the piston to your specific cylinder wear. This kit matches OEM cross-reference 515.30.007.300 for a direct swap. 2-stroke pistons need regular replacement to prevent skirt cracking and loss of performance. Thoroughly clean the cylinder and power valves before installation. Always measure your bore with a dial bore gauge to ensure the correct clearance for your rebuild.

§ 03 / Specs

The numbers

Brand: PROX
Part number: 09103438
Weight: 0.21 kg
OEM cross-refs: 515.30.007.300
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.