CYLINDER FULL KIT 83MM YAMAHA YZ 250 08-13, ATHENA P400485100026 290CC BIG BORE, (piston included)

Athena Big Bore Cylinder Kit - 290cc - 83mm Bore

Enhance your motorcycle's performance with the Athena Big Bore Cylinder Kit. This kit is designed to increase engine displacement and power output while maintaining the reliability of original components. Engineered and manufactured in Italy, Athena utilizes cutting-edge technology and extensive research and development to produce high-quality aftermarket parts.

The cylinder features a motor-nicksil coating, a proprietary nickel-silicon surface developed by Athena for superior smoothness and exceptional wear resistance. This advanced coating ensures longevity and optimal performance under demanding conditions.

Athena's Big Bore Cylinder Kits are globally recognized for their performance, durability, and reliability. This kit guarantees a noticeable increase in the power curve without compromising the integrity of your engine.

This comprehensive kit includes a high-quality aluminum cylinder with an increased bore, a complete piston assembly featuring the piston, piston pin, and rings, and all necessary gaskets for installation. Each component is engineered to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road testing by Athena technicians.

Installation of this cylinder kit can be performed without requiring modifications to the engine crankcase.

Key Features:

• Bore Diameter: 83.00 mm
• Displacement: 290 cc
• Compression Ratio: 12.5:1
• Coating: Motor-nicksil for optimal wear resistance and smoothness
• Included Components: Aluminum cylinder, complete piston kit (piston, pin, rings), and all required gaskets
• Construction: Engineered and manufactured in Italy
• Performance: Increases power output while maintaining reliability
• Installation: No crankcase modifications required
• Weight: 1.70 Kg

Technical Specifications:

• Bore Diameter: 83.00 mm
• Compression Ratio: 12.5:1
• Displacement: 290 cc
• Net Weight: 1.70 Kg