Wiseco PK1697 Pro-Lite Top End Piston Kit for Yamaha - 2-Stroke 69mm YZ250 WR250

The Wiseco PK1697 is a complete Pro-Lite top end piston kit engineered for 1988–1991 Yamaha YZ250 and WR250 two-stroke engines, featuring a 69mm (605M) bore size. This kit contains everything needed to overbore or fully rebuild your top end in a single purchase, making it the ideal solution for motocross, enduro, and off-road riders who demand reliable, high-performance results.

Key Features:

• Forged Pro-Lite piston crafted from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer
• E-Coated crown, ring grooves, and pin bore for maximum wear resistance and protection against micro-welding, galling, and detonation
• Dedicated forging optimizes the strength-to-weight ratio using aerospace-grade alloy
• Complete kit includes: forged piston, piston ring(s), wrist pin, circlips, and top end gasket set
• Race-proven design trusted by top teams in Supercross, Motocross, and GNCC competition
• Engineered and forged in the USA in Mentor, Ohio

Wiseco's Pro-Lite series represents decades of two-stroke piston development, delivering a forged piston that balances performance, durability, and value. The included top end gasket kit ensures a clean, complete rebuild with no need for additional sourcing of components.