CYLINDER FULL KIT 77MM YAMAHA YZ 250 01-07, ATHENA P400485100011 STD BORE, (piston included)

Athena 77mm Standard Bore Cylinder Kit - 250cc

This Athena Standard Bore Cylinder Kit is engineered in Italy for optimal performance and reliability. Designed as a direct replacement for your original cylinder, it ensures the same performance characteristics while offering enhanced durability.

The cylinder features a lightweight aluminum construction with a proprietary motor-nicksil coating. This nickel-silicon coating, developed by Athena, provides exceptional smoothness and superior wear resistance, crucial for longevity under demanding conditions.

This comprehensive kit includes a high-quality aluminum cylinder with a 77mm standard bore, a complete piston assembly (including piston, pin, and rings), and all necessary gaskets for a complete installation. The piston is specifically designed to minimize friction, contributing to the overall efficiency of your engine.

Athena's components undergo rigorous testing by their technicians on both dynamometers and during real-world road tests to validate their ability to withstand extreme temperatures, pressures, and stresses. This cylinder kit can be fitted without requiring any modifications to the engine crankcase.

• Standard bore diameter: 77.00 mm
• Engine displacement: 250 cc
• Compression ratio: 12.5:1
• Smooth and wear-resistant motor-nicksil cylinder coating
• Lightweight aluminum cylinder construction
• Piston designed for reduced friction
• Complete kit includes cylinder, piston assembly, and all required gaskets
• Engineered and tested in Italy
• No crankcase modifications required for installation