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Motorbike parts and tools

Engine parts & cables

Upper engine

Piston kit Prox

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Prox Piston kitRef : PRO00431A / 1129308001

Recommended retail price:181,38 €?

163,20 ^€

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Description
Compatible motorbikes
Questions and answers

DescriptionProx Piston kit

Product details :

Features

PROX Piston Kit – reference 01.1232.A: precision for motocross

This PROX piston kit is designed for demanding motocross riders who seek a reliable and high-revving assembly part. Made from aluminum, featuring a dome piston and standard compression, it adheres to the bore dimensions Ø 65.970 mm (oversize letter A) for a fit that complies with manufacturer specifications.

Main features:

Diameter: Ø 65.970 mm (65.970)
Oversize: A
Material: aluminum
Type: dome piston, standard compression
Universe: Motocross

The kit is delivered complete for refurbishment: pistons, rings, piston pins, and circlips — everything needed to replace the piston/ring assembly and get back on the road or track quickly. The design aims for a balance between lightness and robustness to minimize friction and provide consistent engine behavior in off-road use.

Compatibility (examples): HONDA CRF 150 R (2026), CRF 150 R Big Wheels 16/19 (KE03) 2022, CRF 150 R Std Wheels 14/17 (KE03) 2020. Always check the suitability of the dimensions before installation.

Technical information :

Reference

PRO00431A / 1129308001

Oversize

STD

Compression Ratio

11.7:1

Diameter Ø (mm)

65.970

Engine

Piston diameter

Ø 65,970 mm