Big Bore cylinder kit complete Athena for Yamaha YZ 85 02-18 (Bore Diameter 53mm - 112cc)

All cylinder kit are sold complete with all needed for installation: Athena cylinder, Athena piston and all needed gaskets and to complete the installation.

The Cylinder kit developed by Athena guarantees the same performance as the OEM parts (Standard Bore) or an increase in performance that can be observed along the power curve (Big Bore), extreme reliability and optimal smoothness thanks to the lightweight aluminum cylinder, the barrel with nickel-silicon coating, and a piston designed to further reduce fiction.

The kit includes the high quality aluminum cylinder, the complete piston with piston pin and rings, and the necessary gaskets.
All the components of the thermal group have been studied, manufactured and tested with severe tests on the track and on the static and dynamic bench to ensure maximum resistance to high pressures and temperature.


Additional Cylinder Works cylinder features:

• Stock in appearance
• High quality lightweight aluminum cylinder
• Barrel with nickel-silicon coating
• OEM quality but with a competitive price
• All needed gaskets to complete the installation
• An Athena piston, complete with piston rings, wirst pin and circoli

The cylinders are the aftermarket engine parts in which Athena has been constantly investing for over ten years to improve production and performance. The company's engine cylinders and thermal units are recognized worldwide for their performance, durability and reliability. Entirely engineered in Italy by the Athena R&D department, thanks to its internal know-how and cutting-edge tools to design and test each cylinder, they are coated with motor-nicksil, a nickel-silicon coating developed by Athena to obtain smoothness and a optimal wear resistance.