09101502 PISTON KIT ALUMINUM 66.35MM B

Name: PROX PISTON KIT ALUMINUM 66.35MM B
Brand: PROX
SKU: 09101502
Price: 120.28 GBP
Availability: InStock

Fits 2 bikes

RRP £150.35 Save 20%

£120.28

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09101502

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 66.35MM B, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.

Restore lost compression and engine response with this top-end refresh. This component sits inside the cylinder bore, converting combustion into mechanical drive. Regular replacement is essential to prevent skirt fatigue or catastrophic failure in high-hour engines. This B-sizing allows you to maintain tight tolerances as your bore wears over time. It serves as a direct alternative to OEM part 546.30.207.100. During your rebuild, verify the ring end-gap and ensure the piston arrow points toward the exhaust port. Always use new circlips and lubricate the small-end bearing thoroughly before fitting the cylinder. Check your base gasket thickness to set the correct X-dimension.

§ 03 / Specs

The numbers

Brand: PROX
Part number: 09101502
Category: Top End
Weight: 0.33 kg
OEM cross-refs: 546.30.207.100
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.