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Upper engine

Piston kit Prox Full cast size A

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Prox Full cast size A Piston kitRef : 241028DA / 1095503001

Name: Full cast size A
Brand: Prox
Price: 143.3 EUR
Availability: InStock

Recommended retail price:159,30 €?

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Description
Compatible motorbikes
Questions and answers

DescriptionProx Full cast size A Piston kit

Product details :

The PROX cast piston (Manufacturer reference: 01.2321.A) is designed for motocross riders looking for a robust and reliable replacement part. Machined from a specific aluminum alloy, it adheres to the manufacturing processes commonly used by manufacturers and offers an interesting compromise between strength and bore retention. Its skirt benefits from a Mos2 treatment to reduce friction with the cylinder.

Diameter: Ø 66.35 mm (oversize letter: A)
Compression: Standard — domed head with machining for reeds and intake passage
Manufacturing: cast aluminum piston
Patented surface treatment on the skirt (Mos2) to reduce friction
Ideal as an equivalent replacement for motocross use
Associated parts kit: rings 260137 / pin 031182 / circlips CP1812 / needle cage 400403

This piston is aimed at motorcycle preparations where reliability and ease of installation are paramount. Suitable for YAMAHA YZ 250 (2026), FANTIC XX 250 (2026), and SUZUKI RM 250 (2008) models — please check the exact compatibility with your bore before installation. PROX product, a reliable reference for the maintenance and restoration of motocross engines.

Technical information :

Reference

241028DA / 1095503001

Piston type

Cast

Coast

Dimensions

66.35 mm

Use

All-terrain

Compatible motorbikes

YAMAHA10 compatible models

WR 250 - 2000/2016YZ 250 - 2024/2026YZ 250 (CG23) - 2006/2023YZ 250 X - 2016/2020YZ 250 (CG12) - 2002/2002YZ 250 (CG13) - 2003/2003YZ 250 (CG17) - 2004/2004YZ 250 (CG20) - 2005/2005YZ 250 (CG05) - 1999/1999YZ 250 (CG08) - 2000/2001

SUZUKI1 compatible model

RM 250 - 2003/2012

FANTIC1 compatible model

XX 250 - 2022/2026