CYLINDER FULL KIT 77mm YAMAHA YZ 250F 19-26, ATHENA P400485100072 STD BORE, (Piston included)

Athena Standard Bore Cylinder Kit - 77mm

This Athena Standard Bore Cylinder Kit is meticulously engineered for optimal performance and durability. Developed and manufactured in Italy by Athena's expert R&D department, this kit features a lightweight aluminum cylinder with a nickel-silicon coating for superior smoothness and wear resistance. The included piston is specifically designed to minimize friction, ensuring a reliable and powerful engine.

This kit is designed to deliver the same performance as original spare parts, offering exceptional reliability and smooth operation. All components are built to withstand extreme temperatures, pressures, and stresses, validated through rigorous bench and road testing by Athena technicians. No modifications to the engine crankcase are required for installation.

Key Features:

• Standard Bore Diameter: 77.00 mm
• Displacement: 250 cc
• Compression Ratio: 13.5:1
• Durable nickel-silicon coating developed by Athena
• Lightweight aluminum cylinder construction
• Piston designed for reduced friction
• Includes high-quality aluminum cylinder, complete piston with pin and rings, and all necessary gaskets
• Engineered to withstand high temperatures, pressures, and stresses
• Direct fit installation without engine crankcase modifications

Technical Specifications:

• Bore Diameter: 77.00 mm
• Compression Ratio: 13.5:1
• Displacement: 250 cc
• Net Weight: 1.45 Kg