PX7130B PISTON KIT ALUMINUM 66.36MM B

Name: PROX PISTON KIT ALUMINUM 66.36MM B
Brand: PROX
SKU: PX7130B
Price: 119.5 GBP
Availability: InStock

Fits 4 bikes

RRP £149.38 Save 20%

£119.50

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: PX7130B

Authorised stockist

PROX

14-day returns

Easy & hassle-free

Secure checkout

256-bit encryption

§ 02 / About this part

What it is

The PROX PISTON KIT ALUMINUM 66.36MM B, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This piston kit is engineered for your next top-end rebuild. The B-size diameter accounts for minor cylinder wear to maintain tight tolerances and compression. It serves as a direct replacement for OEM part 1P8-11631-00. Regular piston swaps are vital for 2-stroke performance and preventing skirt failure. This kit includes the piston, rings, gudgeon pin, and circlips. Ensure you measure your bore accurately before fitting. It sits at the heart of your engine and dictates your bike's power delivery and reliability on the track.

§ 03 / Specs

The numbers

Brand: PROX
Part number: PX7130B
Weight: 0.32 kg
OEM cross-refs: 1P8-11631-00
VAT: 20%

// Fitment

Will it fit your bike?

Fits 4 models · 5 year-bands

Suzuki 1 model

RM 250 2003–2012

Yamaha 4 models

* 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.