09100891 PISTON KIT ALUMINUM 66.50MM +2.50MM

Name: PROX PISTON KIT ALUMINUM 66.50MM +2.50MM
Brand: PROX
SKU: 09100891
Price: 94.71 GBP
Availability: InStock

Fits 6 bikes

£111.42 Save 15%

£94.71

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 09100891

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§ 02 / About this part

What it is

The PROX PISTON KIT ALUMINUM 66.50MM +2.50MM, top end. Stocked by Iron Offroad, the UK MX hard parts specialist.

This 66.50mm component is an oversize option for engines requiring a significant rebore. It sits in the top-end, allowing you to salvage a damaged cylinder by boring it out to a fresh surface. This +2.50mm increase requires professional machining and honing to achieve the correct clearance. Regular piston swaps are essential to prevent ring wear and maintain engine efficiency. During the rebuild, check the ring gaps and ensure the circlips are fully seated in their grooves. This kit includes the piston, rings, gudgeon pin, and clips for your workshop overhaul.

§ 03 / Specs

The numbers

Brand: PROX
Part number: 09100891
Category: Top End
Weight: 0.30 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 6 models · 6 year-bands

Yamaha 6 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 — this is a UK shop for motocross, enduro, and trail-bike hard parts. All fitments live on the site, and listed against MX models KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is in the data, fully enriched to assist with accurate fitting and finding the right part for your bike quickly and easily. 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 & e-moto only. We operate from our huge storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. We have a RICH motorcycle history with multiple moto brands the images showing where we came from and our history, the business recently pivoted into hard parts and online retail.