Wiseco Piston Kit 81mm Yamaha WaveRunner 1994-1997 790M08100

If you're running a 2-cycle engine in your WaveRunner and pushing performance limits, you need a piston that can handle sustained heat and detonation without failure. The Wiseco 790M08100 delivers the thermal stability and structural integrity required for competitive racing and high-output applications, backed by a complete ring and pin assembly ready for installation.

This forged piston eliminates the guesswork in engine rebuilds by providing everything you need in one kit—no hunting for compatible rings or pins. Built from high-silicone forged bar stock, it resists thermal expansion far better than OEM alternatives, maintaining precise clearances even under extreme operating conditions.

• 81mm bore diameter
• High-silicone forged construction
• Lower thermal expansion rate
• Includes compression rings
• Includes wrist pins
• Includes circlips
• Yamaha WaveRunner 1994-1997 compatible
• Requires Wiseco-spec rings
• Racing-grade durability
• 2-cycle engine optimized
• Bolt-on installation