Wiseco Piston Standard Yamaha YZ 125 1998-2001 726M05400

When you're pushing your YZ 125 to the limit, your piston is doing the hardest work in the engine—and a worn or damaged one will cost you power, reliability, and race results. The Wiseco 726M05400 is engineered to restore peak combustion efficiency while delivering the durability needed for competitive riding and trail abuse alike. Drop this in, and you'll feel the difference in throttle response and mid-range punch immediately.

Built from high-silicon aluminum and precision CNC-machined to exact tolerances, this piston manages heat without sacrificing strength. The lightweight design cuts rotating mass, which translates to quicker acceleration and snappier engine response. Whether you're chasing lap times or just want reliable performance from your 125, this is the upgrade that actually matters.

• Fits Yamaha YZ 125 (1998–2001)
• High-silicon aluminum alloy
• CNC-machined precision tolerances
• Enhanced combustion chamber design
• Reduced rotating mass
• Increased horsepower and torque
• Improved heat dissipation
• Extended piston lifespan
• Bolt-on installation
• MPN: 726M05400