Wiseco PK1351 Pro-Lite 56.0mm Forged Piston Kit 2001 Yamaha YZ125

The Wiseco PK1351 is a Pro-Lite forged piston kit designed for the 2001 Yamaha YZ125, featuring a 56.0mm bore diameter (726M). Engineered specifically for 2-stroke motocross competition, this kit delivers the strength, durability, and precision fit that serious riders demand from a top-end rebuild.

Key Features:

• 56.0mm bore diameter — precision-sized for a direct OEM replacement or stock bore rebuild
• Pro-Lite forged construction — fully forged in-house in the USA for superior strength-to-weight ratio
• Condensed grain structure — forging aligns grain to part geometry, improving mechanical properties, impact resistance, and fatigue life
• Skirt coating — factory-applied coating reduces friction and improves wear resistance
• Includes top-end gasket kit — everything needed for a complete top-end rebuild in one package
• USA manufactured — forged and finished domestically with full in-house quality control from raw bar to finished part
• Dyno-tested design — developed using Wiseco's in-house dynamometer testing for optimized performance

Wiseco's Pro-Lite series is purpose-built for high-performance 2-stroke applications where cast pistons simply cannot keep up. Unlike brittle cast alternatives, the PK1351 forged piston resists catastrophic failure under peak power loads — making it the trusted choice for motocross, off-road, and dirt bike racing applications. The complete kit format, including the matched gasket set, streamlines the rebuild process and ensures proper sealing from day one.