Athena Big Bore Cylinder Kit

Athena has been constantly investing in cylinder aftermarket replacement parts for more than ten years, to improve their production and performance. All the cylinders are entirely engineered in Italy by Athena s R&D Department which has a strong internal know-how and cutting-edge tools to design and test each piece. They are coated with motor-nicksil, a nickel-silicon coating developed by Athena to obtain smoothness and optimal wear resistance.

Athena s cylinder kits and its components are recognized worldwide for their performance, durability and reliability.

Athena s Big Bore Cylinder Kits guarantees an increase in performance that can be observed along the power curve, keeping the reliability at the same level of the original components.

The kit includes the high-quality aluminum cylinder with increased bore, the cylinder head, the complete piston with the piston pin and rings, the exhaust valve kit, and all the necessary gaskets.

All the components of the kit have been developed to withstand the highest temperatures, pressures and stresses and have been validated by Athena technicians with severe bench and road tests.

This cylinder kit can be installed without making any changes to the engine crankcase.

CAUTION! All Athena products must be used in compliance with the specific national regulations of the member state where it is being marketed or sold. Athena declines all responsibility for any improper use.

Description:

• Sensitive increase in performance without compromising engine reliability
• Maximum durability and smoothness guaranteed by a special nickel and silicon treatment of the barrel
• Cylinder made of a special light aluminum alloy

Item Specs:

• Bore Diameter (mm): 72.00
• Bore Gain (mm): + 5.6
• Compression Ratio: 15.0:1
• Displacement (cc): 293.00
• Net Weight (Kg): 3.95

Brand: Athena
Part Number: P400485100042

Fitment:

• Yamaha YZ250 2T 2003-2024
• Yamaha YZ250 2003-2024

Note: Image is for reference only, actual product may vary slightly.