
Manufacturer part number: 01.4223.A — PROX cast piston, designed for motocross use. Machined and treated aluminum piston, intended for original replacement on 125 cm³ engines equipped for an oversize A.
This PROX cast piston is aimed at riders and mechanics looking for a robust replacement part for the restoration or maintenance of their motocross engine. The domed head promotes a chamber geometry suitable for original configurations, and the drilled skirt on the exhaust side allows for targeted lubrication to limit local wear.
Compatibility (examples): KAWASAKI KX 125 (KX125M) 2006, 2007, 2008 — check the oversize rating and displacement before installation.
Recommended associated parts: replacement rings 260238, clips CP1510, needle cage 400413, top-end gasket kit 602136. Installation by a qualified mechanic is advised to ensure proper clearance and alignment.