Wiseco WK1261 Kawasaki 750 PWC Forged Piston Kit 83mm 3.00mm Overbore 801cc

The Wiseco WK1261 is a high-performance forged piston kit designed for Kawasaki 750 personal watercraft engines. Featuring an 83mm (3.268") bore diameter representing a 3.00mm overbore, this kit displaces approximately 801cc and is a direct upgrade for SS750, STX750, and XI 750 Jet Ski applications. Each kit includes the forged piston, high-performance piston rings, alloy wrist pin, and circlips — everything needed for a complete top-end rebuild.

Key Features:

• Forged high-silicon, low-expansion aluminum construction delivers superior strength, reduced weight, improved heat transfer, and extended service life compared to cast alternatives
• Pro-Lite 2-stroke design with CNC-machined cam shape and profile optimized for peak horsepower and longevity
• Diamond-turned finish from precision CNC turning centers ensures consistent sizing and a perfect cylinder wall interface with no size variation
• Compatible with all modern cylinder bore compositions — cast iron, chrome, Nikasil, and boron composite — for maximum installation versatility
• 3.00mm oversize extends the service life of worn cylinders; chrome, Nikasil, and boron composite cylinders can be resleeved to accept this oversize
• Complete kit includes forged piston, high-performance ring set, alloy wrist pin, and circlips
• Engineered and manufactured in the USA at Wiseco's state-of-the-art facility in Mentor, OH

Wiseco part number WK1261 / Piston number 809M08300. Wiseco has been the benchmark for forged piston technology in powersports for over 80 years, trusted by professional racers and recreational riders alike.