Wiseco PK1619 Top End Piston Kit 72mm for 1985-1986 Kawasaki KX250

The Wiseco PK1619 is a complete top end piston kit designed for the 1985–1986 Kawasaki KX250, featuring a 72mm (439M) bore diameter. This kit provides everything needed for an overbore or top end rebuild, ensuring a reliable, performance-ready fit right out of the box.

Wiseco is a trusted name in high-performance forged pistons, manufacturing components to strict tolerances for improved durability and power output compared to OEM cast alternatives. Each piston is forged from high-strength aluminum alloy, offering superior heat resistance and strength under the demanding conditions of two-stroke motocross applications.

Kit Includes:

• Forged aluminum piston (72mm / 439M bore)
• Piston rings
• Wrist pin (piston pin)
• Circlips (wrist pin retaining clips)
• Top end gasket set

Key Features:

• Forged construction for superior strength and longevity over cast pistons
• Precision-machined to exacting tolerances for proper ring seal and compression
• Complete kit eliminates the need to source individual components separately
• Designed specifically for the 72mm overbore application on the KX250
• Includes top end gasket set for a comprehensive rebuild solution

Whether you are rebuilding a worn top end or upgrading to an overbore configuration, the Wiseco PK1619 delivers the quality and completeness to get your KX250 back on the track with confidence.