Wiseco 602M07750 Forged Piston Kit 77.5mm Bore Yamaha WaveRunner SuperJet 650

The Wiseco 602M07750 is a forged aluminum piston and ring kit designed for Yamaha WaveRunner and SuperJet 650 marine applications. With a 77.50mm bore and a 68.00mm stroke, this kit delivers the precision fitment and durability that demanding powersports engines require. The kit includes the piston, rings, wrist pin, and circlips — everything needed for a complete top-end rebuild.

Key Features:

• Forged aluminum construction — manufactured from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer compared to cast alternatives
• 77.50mm bore diameter with a floating wrist pin design for smooth, reliable operation under high-stress conditions
• Diamond-turned finish produced on CNC turning centers ensures precise sizing with no variation, allowing confident installation in cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Complete kit — includes piston rings, piston pin, and circlips for a straightforward top-end service
• Oversize availability — part of Wiseco's wide oversize range to restore worn cylinders and extend engine life, compatible with replacement sleeves for chrome, Nikasil, and boron composite cylinders
• USA manufactured in Wiseco's state-of-the-art CNC machining facility in Mentor, Ohio

Wiseco has decades of experience producing high-performance forged pistons for marine, powersports, ATV, and motorsport applications. The 602M07750 meets the demands of both recreational riders and performance-focused operators seeking a reliable, long-lasting piston solution for the Yamaha 650 engine platform.