CYLINDER FULL KIT 53mm YAMAHA YZ 85 19-25, ATHENA P400485100077 105CC BIG BORE, (Piston included)

Athena 53mm Big Bore Cylinder Kit 105cc

Upgrade your motorcycle's performance with the Athena Big Bore Cylinder Kit. Engineered and manufactured in Italy, this kit is designed to enhance power and reliability.

The cylinder features a 53mm bore diameter, increasing displacement to 105.46cc. Its surface is coated with Athena's proprietary Motornicksil, a nickel-silicon coating renowned for its exceptional smoothness and wear resistance. This advanced coating ensures optimal performance and longevity, even under demanding conditions.

Athena's Big Bore kits are globally recognized for their superior performance, durability, and reliability. This kit provides a noticeable increase in power across the entire rev range while maintaining the same level of reliability as original components.

Key Features:

• Increased Bore Diameter: 53.00mm
• Bore Gain: +5.5mm
• Displacement: 106cc
• Compression Ratio: 14.0:1
• Cylinder coated with Motornicksil for enhanced smoothness and wear resistance
• Cylinder designed with 5 exhaust ports
• Cylinder head with interchangeable central dome
• Includes a high-quality aluminum cylinder, cylinder head, flat-top cast piston with two rings, special Ergal valve with nickel treatment, and all necessary gaskets.

All components within the kit have been rigorously tested by Athena technicians on benches and during road tests to withstand extreme temperatures, pressures, and stresses. This guarantees that the kit will perform exceptionally under the most demanding riding conditions.

Important Note: All Athena products must be used in compliance with applicable national regulations. Athena disclaims responsibility for any improper use.