Wiseco Piston Kit 1.00 mm Oversize for Yamaha YZ 250 1999-2022 677M06900

If you're running a YZ 250 in competitive trail or race conditions, a worn or stock piston limits your engine's potential for power and reliability. The Wiseco +1.00 mm piston kit delivers the compression increase and durability you need to extract maximum horsepower while maintaining the predictable powerband that separates winners from the field. This is a complete, bolt-together solution that eliminates guesswork and gets you back to racing.

Built from high-silicon aluminum and featuring Wiseco's proven forging design, this piston handles the demands of both technical terrain and high-RPM racing. The E-coated crown and ring grooves resist wear and micro-welding, while the optimized geometry ensures consistent performance across your entire power range. Whether you're a professional racer or a dedicated tuner, this kit delivers the precision and longevity you depend on.

• Wiseco +1.00 mm oversize
• High-silicon aluminum construction
• Complete kit included
• Forged piston design
• Forged wrist pins
• Piston rings (set)
• Circlips included
• E-coated crown
• E-coated ring grooves
• Enhanced compression ratio
• Optimized bore sealing
• Increased power output
• Fits Yamaha YZ 250
• 1999–2022 model years
• MPN: 677M06900