Wiseco WK1019 Pro-Lite 2-Stroke Forged Piston Kit 77.5mm Bore Kawasaki 650 PWC

The Wiseco WK1019 is a complete twin-cylinder Pro-Lite forged piston kit designed for Kawasaki 650 personal watercraft. Featuring a 77.50mm overbore diameter (+1.5mm over standard), this kit effectively upgrades the displacement of your Kawasaki 650 Jet Ski to approximately 660cc for improved power output. Piston part number cross-reference: 549M07750.

Key Features:

• Pro-Lite Forged Construction: Forged from high-silicon, aerospace-grade aluminum bar stock for superior strength, lower thermal expansion, and reduced weight compared to cast alternatives
• CNC Machined: Each piston is precision CNC machined for optimal cam shape and profile, delivering peak horsepower and extended service life
• Horizontal Slot-Pin Oiling: Reduces friction and provides scuff resistance, paired with a pressure seal groove for maximum ring seal
• Dual Ring Design: Engineered for reliable sealing in 2-stroke PWC applications
• USA Made: Manufactured at Wiseco's state-of-the-art facility using finite element modeling and 3D design techniques
• Compatible Cylinder Bores: Suitable for use in cast iron, chrome, Nikasil, and boron composite cylinder bores

Kit Includes:

• 2x Pro-Lite forged pistons (77.50mm)
• Piston rings
• Wrist pins (piston pins)
• Circlips
• Complete top-end gasket set

Important Notes: Wiseco ring types are not interchangeable — Wiseco rings fit only Wiseco pistons. Crankcase machining is required when installing the 77.5mm or larger bore size. This is a 2-stroke piston kit.