Wiseco 641M05600 Pro-Lite Forged Piston Kit Overbore - 56mm 2mm 2-Stroke

The Wiseco 641M05600 Pro-Lite Piston Kit is a forged 2-stroke piston engineered for the Suzuki RM125 (1989–1999). At 56.00mm bore diameter, this is an +0.080" (2.0mm) oversized piston designed for engines that have been bored or replated beyond the standard 54mm specification. It is part of Wiseco's legendary Pro-Lite line—the forged 2-stroke piston that set the benchmark for performance and reliability in powersports.

Key Features:

• Forged high-silicon aluminum alloy construction for a superior strength-to-weight ratio
• 56.00mm bore diameter — +0.080" (2.0mm) oversize for bored or replated cylinders
• Aerospace-grade alloy delivers durability and consistent performance under high-RPM 2-stroke conditions
• CNC-machined piston profile with optimized cam shape for peak horsepower and extended service life
• Innovative skirt design maximizes horsepower and torque output
• High-performance ring set included for extended service life and sustained power
• Precision alloy wristpin included for consistent, low-friction operation
• Complete kit includes: 1 piston, ring set (2205CS), wristpin, and 2 circlips
• Note: Cylinder boring or replating is required. Top-end bearings, gaskets, and sleeves are not included.

Wiseco Pro-Lite pistons are the result of decades of 2-stroke piston development, trusted by trail riders and racers alike for their proven reliability and all-purpose performance. The 641M05600 is a direct replacement piston kit built to restore or upgrade the top end of a Suzuki RM125 engine with confidence.