Wiseco Pistons 40066M10200 Forged Piston Kit Standard Bore - 102.00mm

The Wiseco 40066M10200 is a high-performance forged piston kit designed for riders and builders who demand maximum reliability and power output. Wiseco's piston kits are engineered to exacting tolerances, making them a trusted choice in powersports, motocross, and off-road applications.

Each piston is forged from high-silicon aluminum alloy, delivering superior strength-to-weight ratio compared to cast pistons. The innovative forging design and precision-machined piston skirt geometry are optimized to maximize horsepower and torque throughout the RPM range.

Kit Includes:

• Forged high-silicon aluminum alloy piston — 102.00mm standard bore
• Piston rings
• Wrist pin
• Circlips

Key Features:

• High-silicon aluminum alloy forging for enhanced durability and thermal stability
• Optimized piston skirt design reduces friction and improves power delivery
• Manufactured to OEM-equivalent or better tolerances for reliable fitment
• Complete kit eliminates the need to source components separately
• Oversize pistons require cylinder sleeving or boring — confirm bore size before ordering

Wiseco has been a leading manufacturer of performance forged pistons since 1941, supplying professional racers and enthusiasts alike. The 40066M10200 piston kit is a direct-fit upgrade built for long-lasting performance under demanding conditions.