Prox Full cast size A Piston kitRef : 9399DA / 1094857001

PROX Cast Piston (manufacturer part number: 01.6394.A) — aluminum piston designed for the repair and maintenance of motocross engines. Designed to replace the original piston on the relevant 300 cc displacements, it features a flat top and standard compression to maintain the original performance characteristics.

• Diameter: Ø 71.94 mm
• Oversize letter: A
• Material: cast aluminum
• Specificity: flat top
• Piston compression: standard
• Replacement rings: reference 260206

Suitable for the motocross world, this PROX piston is a replacement part during an engine opening, in case of wear or for a restoration 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 cc), HUSQVARNA TE 300 (2016, 300 cc), HUSABERG TE 300 (2014, 300 cc). Before installation, check the condition of the cylinder, rings, and connecting rod; installation and break-in by a professional are recommended for reliable results.