Wiseco 2-Stroke Pro-Lite Series - ø66.40mm Piston kitRef : WI00122A / 1122556002

WISECO 2T Pro-Lite Series Piston Kit - Ref. W856M06640B
Wiseco forged aluminum piston, designed for replacements and modifications on 2-stroke motocross engines. The Pro-Lite series offers a part derived from Wiseco's expertise, tailored to the demands of off-road conditions: thermal resistance and wear characteristics typical of forged pistons.

• Piston diameter: Ø 66.34 mm (oversize +0.01 – letter B)
• Reported diameter: Ø 66.320 mm (manufacturer data)
• Piston compression: Standard
• Material: Forged aluminum
• Manufacturer reference: W856M06640B

This piston kit is aimed at motocross riders who are replacing a factory piston or performing a light engine modification. The finish and tolerance (+0.01 mm) allow for installation that conforms to machining specifications on oversized bores. To ensure longevity and optimal performance, adhere to the assembly and break-in recommendations from the engine manufacturer.

Common compatibilities: KTM 250 SX (2025), HUSQVARNA TC 250 (2025), GAS GAS MC 250 (2024) — check the bore size and reference before installation. Installation is recommended by a professional or an experienced mechanic to ensure fit, timing, and safety during racing.