Wiseco PK1177 Pro-Lite 2-Stroke Top-End Piston Kit 44.50mm Standard Bore

The Wiseco PK1177 is a complete 2-stroke top-end piston kit designed for the Kawasaki KX65 and Suzuki RM65, featuring a standard bore diameter of 44.50mm (752M). Wiseco is the only aftermarket piston manufacturer in the United States that produces pistons exclusively using the forging process, resulting in superior strength, reduced weight, and outstanding durability compared to cast alternatives.

This kit features Wiseco's Pro-Lite forged piston, which is CNC machined to an optimal cam shape and profile for maximum horsepower output and extended service life. Starting from aerospace-grade aluminum alloy, the forging process aligns the grain flow of the material, producing a piston that is highly resistant to impact, fatigue, and heat — exactly what demanding 2-stroke race engines require.

Kit Includes:

• Wiseco Pro-Lite forged piston (44.50mm standard bore)
• High-performance ring set for extended life and sustained power
• Precision-machined, high-quality alloy wrist pin
• Premium top-end needle wrist pin bearing
• Complete top-end gasket kit with premium materials exceeding OEM sealing standards
• Wrist pin circlips

Key Features:

• Dedicated forging tooling specific to this application — not a universal blank
• Aerospace alloy construction for a superior strength-to-weight ratio
• CNC machined skirt profile optimized for peak HP and long service intervals
• Race-proven design trusted by top motocross and off-road race teams
• All components are precision-matched to work together as a system
• Complete kit for a straightforward, one-stop top-end rebuild

Wiseco engineers utilize 3D design techniques and finite element modeling to ensure each piston delivers the highest strength and lightest weight for the application. All forging and machining is performed in-house, giving Wiseco complete control over quality from raw bar stock to finished part.