
PROX Cast Piston (manufacturer reference: 01.6394.A) — aluminium piston designed for the refurbishment and maintenance of motocross engines. Designed to replace the original piston on the relevant 300 cm3 displacements, it features a flat top and standard compression to maintain the original usage characteristics.
Suitable for the motocross universe, this PROX piston is a replacement part during an engine opening, in case of wear or for refurbishment after a fall or cylinder resurfacing. Check the Ø and the oversize letter on your cylinder before installation to ensure proper fit (oversize A).
Common compatibilities: KTM 300 EXC SIX DAYS (2016, 300 cm3), HUSQVARNA TE 300 (2016, 300 cm3), HUSABERG TE 300 (2014, 300 cm3). Before installation, check the condition of the cylinder, segments, and connecting rod; installation and running-in by a professional are recommended for reliable results.