Wiseco Pistons PK1241 Top End Piston Kit for 2001-2004 Yamaha YZ250F 77.0mm

The Wiseco PK1241 Top End Piston Kit is specifically engineered for 2001-2004 Yamaha YZ250F motorcycles with a 77.0mm bore diameter. This complete kit provides everything needed for a professional-grade top end rebuild, featuring Wiseco's race-proven forging technology and premium components trusted by championship-winning teams.

Complete Top End Kit Includes:

• Dedicated forged piston (4872M) utilizing aerospace-grade aluminum alloy for superior strength-to-weight ratio
• High-performance ring set designed for extended service life and sustained power output
• Premium top end needle bearing with precision machining for reduced friction and increased durability
• High-quality alloy wrist pin engineered for consistent performance and reliability
• Complete Wiseco top end gasket kit with advanced sealing technology that exceeds OEM specifications

Performance Features:

• CNC-machined piston with optimal cam shape and profile for peak horsepower and maximum service life
• Race-proven design chosen by professional motocross and off-road racing teams
• Premium materials throughout ensure superior sealing, strength, and longevity
• Direct replacement for OEM components with enhanced durability and performance

Wiseco pistons are manufactured to exacting tolerances and represent the gold standard in aftermarket piston technology. Whether you're rebuilding for racing or refreshing your engine for reliable trail performance, the PK1241 kit delivers professional-grade quality and proven durability.