
PROX Cast Piston referenced 01.4408.A, designed for motocross riders seeking a reliable replacement part for their 2-stroke/4-stroke engine (depending on installation). Machined from aluminium, this oversize letter A piston features a precise diameter of Ø 85.94 mm (85.940 mm) and a standard compression configuration. Ideal for top-end rebuild operations, it fits into cylinders requiring an oversize A to achieve the correct piston-cylinder clearance.
Compatible with several Cross models including Kawasaki KX 500 (KX500D 1988, KX500E 2002-2003); check the diameter and oversize before installation. Useful references for supporting parts: replacement segments 260193 and needle cage 400436. Installation and checks recommended by a specialist: bore inspection, condition of the sleeve, and piston/cylinder clearance before installation.