CYLINDER FULL KIT 58MM YAMAHA YZ 125 05-21, ATHENA P400485100030 FOR 144CC BIG BORE, (Piston included)

Athena 144cc Big Bore Cylinder Kit 58mm for Yamaha YZ 125 (2005-2021)

Enhance the performance of your Yamaha YZ 125 with this Athena Big Bore Cylinder Kit. Engineered and designed in Italy by Athena's dedicated R&D department, this kit offers a significant increase in power and torque while maintaining the reliability of your original components. The precision-crafted aluminum cylinder features a 58mm bore, increasing displacement to 144cc. It is coated with Athena's proprietary motor-nicksil, a nickel-silicon coating that provides exceptional smoothness and wear resistance for long-lasting durability.

This comprehensive kit includes everything needed for installation, including a high-quality aluminum cylinder with an increased bore, a cylinder head, a complete piston assembly with piston pin and rings, and all necessary gaskets. Athena's components are rigorously tested on benches and in real-world conditions to ensure they can withstand extreme temperatures, pressures, and stresses. This big bore kit can be installed without requiring any modifications to the engine crankcase.

Key Features:

• Big Bore Upgrade: Increases displacement to 144cc for enhanced power and performance.
• Precision Engineering: Designed and developed in Italy by Athena's R&D department.
• Durable Coating: Features Athena's motor-nicksil coating for superior smoothness and wear resistance.
• Complete Kit: Includes cylinder, cylinder head, piston kit (piston, pin, rings), and all necessary gaskets.
• Reliability: Designed to maintain the reliability of original components.
• Easy Installation: Can be installed without modifying the engine crankcase.
• High Performance: Delivers observable power gains across the entire power curve.

Technical Specifications:

• Bore Diameter: 58.00 mm
• Bore Gain: + 4 mm
• Compression Ratio: 14.0:1
• Displacement: 144 cc
• Net Weight: 1.50 Kg