Wiseco 549M07700 ProLite Forged Piston Kit 77mm 2-Stroke Personal Watercraft JS300/650

The Wiseco 549M07700 is a ProLite forged piston kit designed for Kawasaki JS300 and JS650 personal watercraft engines with a 77.00mm (3032TD) bore. Built to handle the rigorous demands of both recreational riding and competitive racing, this kit delivers superior performance and durability over stock cast pistons.

Kit Includes:

• Forged piston
• Piston ring(s)
• Wrist pin
• Circlips

Key Features:

• Aerospace-Grade Forged Construction: Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, improved heat transfer, and extended service life compared to cast alternatives
• ProLite Design: Innovative forging geometry and piston skirt profile engineered to maximize horsepower and torque output
• CNC Diamond-Turned Finish: Precision machined on CNC turning centers for a consistent surface finish with zero size variation across the bore
• Universal Cylinder Compatibility: Designed for use in cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Oversize Availability: Standard and oversize options available; oversize pistons require cylinder resleeving for chrome, Nikasil, and boron composite cylinders
• 3D-Engineered Tolerances: Each piston design utilizes finite element modeling software to optimize the strength-to-weight ratio for the specific application

Wiseco is the only aftermarket piston manufacturer in the United States that exclusively uses the forging process, producing all pistons and forge tooling in-house for complete quality control from raw material to finished part. The 549M07700 piston kit is a direct performance upgrade for Kawasaki Jet Ski 2-stroke engines in the JS300 and JS650 platform.

Warning: This product is not CARB legal and is not for sale in California. CA Residents: Cancer and Reproductive Harm — www.P65Warnings.ca.gov