Wiseco 4786M09700 97mm 13:1 High Compression Forged Piston Kit

The Wiseco 4786M09700 is a high-performance forged piston kit built for serious off-road competition. Featuring a 97mm bore and an aggressive 13:1 compression ratio, this piston is engineered to maximize power output and throttle response in demanding four-stroke applications.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer compared to cast alternatives
• Dedicated forging design with optimized piston skirt geometry to maximize horsepower and torque
• 13:1 high compression ratio for maximum power output in race and high-performance builds
• 97.00mm bore diameter — oversize pistons require cylinder re-boring or sleeving
• Diamond-turned finish from CNC machining centers for tight tolerances and precise fitment
• Wiseco is the only U.S. manufacturer of powersports pistons with in-house forging capabilities

Kit Includes:

• Forged piston
• High-performance piston rings
• Wrist pin
• Circlips

Wiseco piston kits are trusted by top professional race teams worldwide and are engineered to deliver consistent performance across a wide range of racing and high-performance applications. This kit is a direct upgrade for riders seeking more compression and power from their 450cc four-stroke engine build.