
PROX Cast Piston — designed for 2-stroke motocross engines, this PROX piston is molded from a specific aluminum alloy to reduce friction and enhance the longevity of moving parts. Its design adheres to original specifications while incorporating targeted machining for the intake.
This piston is aimed at riders and mechanics looking for a robust replacement part for 85 cc motocross engines. The domed head and dedicated machining facilitate adaptation to reed valve configurations, while the oversize A allows for restoration during a corresponding re-boring.
Main compatibilities (examples): KAWASAKI KX 85 II (2026), KAWASAKI KX 85 I (2026), KAWASAKI KX 85 STD WHEELS 17/14 (KX85C) (2021).
Manufacturer reference: 01.4124.A