Athena 85mm 289cc Big Bore Cylinder Top End Kit!

This is the best and most reliable big bore kit on the market!

Fits Honda CRF250R & CRF250RX Dirt Bikes

 Years 2019 2020 2021 2022 2023 2024

This kit includes:

• 85mm 289cc Nikasil Athena Big Bore Cylinder
• Athena 89mm Forged & Race Coated Piston Kit (Includes, Piston, Pin, Rings & Clips)
• 13.7:1 Compression (Perfect For Pump Gas)
• Athena Complete Top End Gasket Set

All parts come with warranty.

We ship worldwide & ship all domestic orders free!