Wiseco Pistons PK1157 Top End Piston Kit for Yamaha PW50 40.0mm

The Wiseco PK1157 Top End Piston Kit is engineered specifically for Yamaha PW50 models through 2009, featuring a precision 40.0mm bore size. This complete kit provides everything needed for a professional-quality top end rebuild, utilizing Wiseco's decades of racing expertise and manufacturing excellence.

Complete Top End Kit Includes:

• Dedicated forging piston constructed from aerospace-grade aluminum alloy for optimal strength-to-weight ratio
• High-performance ring set designed for extended life and sustained power output
• Premium top end needle bearing with precision machining for reduced friction
• Highest quality alloy wrist pin for consistent performance and durability
• Complete Wiseco top end gasket kit with premium materials that exceed OEM sealing standards

Performance Features:

• CNC machined piston with optimal cam shape and profile for peak horsepower and maximum service life
• Race-proven design chosen by top racing teams across all forms of motorsports competition
• Superior material quality ensures reliability in demanding youth motorcycle applications

Wiseco pistons are manufactured using advanced forging techniques and undergo rigorous quality control to deliver professional-grade performance and reliability. The 653M forging designation ensures consistent metallurgy and structural integrity for long-lasting performance on the PW50 platform.