Wiseco 4902M10300 103mm 9.2:1 Forged Piston Kit for Yamaha 700 ATV

The Wiseco 4902M10300 is a forged piston kit engineered specifically for Yamaha 700cc ATV engines. Featuring a 103.00mm bore diameter and a 9.2:1 compression ratio, this kit is designed as an oversize (.040) replacement piston for trail and performance riding applications.

Wiseco is the only aftermarket piston manufacturer in the United States that produces pistons exclusively using the forging process. Starting with aerospace-grade aluminum, the forging process compresses the material's molecules, increases aluminum density, and aligns the grain flow of the alloy — resulting in a piston that is resistant to impact and fatigue, with superior tensile strength and ductility compared to cast alternatives.

Key Features:

• 103.00mm bore / 9.2:1 compression ratio — oversize (.040) piston for rebuilt or bored cylinders
• Forged from high-silicon aerospace-grade aluminum for maximum strength and dependability
• Dedicated forging design optimizes the strength-to-weight ratio for each specific engine application
• Innovative piston skirt design engineered to maximize horsepower and torque output
• Engineered, forged, and machined in the USA in Mentor, OH
• Kit includes piston, high-quality rings, wrist pin, and circlips

Each Wiseco piston is designed using the latest 3D CAD techniques and finite element modeling (FEM) software to ensure optimal performance and longevity under demanding powersports conditions. Whether for trail riding or competitive racing, the 4902M10300 delivers the reliability and power that Yamaha 700 ATV owners demand.