Wiseco 2-Stroke Pro-Lite Series - ø66.40mm Piston kitRef : WI00121A / 1122556001

WISECO 2T Pro-Lite Series Piston Kit - ø66.40mm (Manufacturer Part No: W856M06640A)

The WISECO Pro-Lite forged piston is designed for competition and tuned 2-stroke engines. Made from high-strength aluminum, it replaces the original component to provide reliable and durable performance in motocross use. Recommended for engine replacement or tuning, this piston adheres to original tolerances and manufacturer architecture.

• Type: Forged 2T Pro-Lite Piston
• Nominal Diameter: ø66.40 mm (product reference)
• Measured Diameter: Ø 66.34 mm / Ø 66.310 mm (factory tolerances)
• Compression: standard
• Oversize: STD — letter A
• Material: aluminum

Designed to withstand the stresses of high RPMs and repeated jumps in motocross, this piston fits into setups aimed at optimizing engine performance without altering the base geometry. Examples of applications: KTM 250 SX (2025), HUSQVARNA TC 250 (2025), GAS GAS MC 250 (2024).

Installation: follow assembly recommendations, bore inspection, and break-in procedures according to the technical manual. For optimal tuning and longevity, have the installation performed by a qualified mechanic or tuner.