CYLINDER FULL KIT 102MM YAMAHA YZ 450 18-20, ATHENA P400485100068 497CC BIG BORE, (Piston included)
ATHENA Big Bore Cylinder Kit Ø 102 mm, 497 cc P400485100068 includes a complete piston. Athena has invested in aftermarket cylinder replacement parts for over ten years, focusing on production and performance. Cylinders are engineered in Italy by Athena’s R&D Department. They feature a nickel-silicon coating for smoothness and wear resistance. Athena's cylinder kits are known worldwide for performance, durability, and reliability. Big Bore Cylinder Kits guarantee an observable increase in performance along the power curve while maintaining original component reliability. The kit includes a high-quality aluminum cylinder with an increased bore, a complete piston with pin and rings, and all necessary gaskets. Components are developed to withstand high temperatures, pressures, and stresses, validated by Athena technicians through bench and road tests. This cylinder kit installs without engine crankcase modifications. Technical features include a bore diameter of 102.00 mm, a bore gain of +5 mm, a compression ratio of 12.3:1, and a displacement of 497 cc.
- SKU
- 56-K198.102_BB.ATH
- Brand
- Athena
- Availability
- In Stock (1)
FULL DESCRIPTION
Athena Big Bore Cylinder Kit - 497cc
Upgrade your motorcycle's performance with the Athena Big Bore Cylinder Kit. This comprehensive kit is engineered to enhance power and torque while maintaining the reliability of your original components. Athena's commitment to quality and innovation is evident in every part of this kit, designed and tested in Italy.
Key Features:
- Increased Displacement: Boosts your engine to 497cc for significant performance gains.
- Durable Construction: Features a high-quality aluminum cylinder coated with Athena's proprietary Motor-Nicksil, offering exceptional smoothness and wear resistance.
- Complete Kit: Includes the enlarged bore cylinder, a complete piston assembly (piston, pin, rings), and all necessary gaskets for a straightforward installation.
- Enhanced Performance: Experience a noticeable increase in power throughout the RPM range.
- Reliable Engineering: Designed to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road testing.
- No Crankcase Modification: This kit can be installed without altering the engine crankcase.
Technical Specifications:
- Bore Diameter: 102.00 mm
- Bore Gain: + 5 mm
- Compression Ratio: 12.3:1
- Displacement: 497 cc
Important Note: All Athena products must be used in compliance with applicable national regulations. Athena assumes no responsibility for improper use.


