Prox Forged Piston Piston kitRef : PRO00576A / 1094902001

PROX Forged Piston – Manufacturer Ref. 01.7309.A

Designed for motocross use, this PROX forged piston utilizes a specific alloy and an industrial process employed by many manufacturers. It offers an excellent performance/reliability ratio for demanding 2-stroke engines and serves as an equivalent replacement for the original part.

• Diameter: Ø 66.340 mm (oversize letter A)
• Compression: standard
• Material: forged aluminum
• Geometry: domed head to optimize the combustion chamber
• Lubrication: 2 holes on the exhaust side skirt
• Treatment: patented surface treatment to reduce friction
• Compatible needle cage: 400403

Installation, break-in, and clearance checks are essential to maintain engine reliability. This piston is aimed at riders and tuners seeking a robust part for 250 cm³ motocross engines — common application examples include:

• TM RACING MX 250 (2020)
• EVO-SET XC250R (2015)
• TM RACING EN 250 2T FI ES (2020)

A quality replacement part, it integrates into maintenance operations or during an engine rebuild to restore engine behavior close to the original.