Athena P400210100023 163.5cc Big Bore Cylinder Kit (69mm Bore) - Forged Piston Performance Upgrade, Converts 150cc to 163.5cc, Compatible with Honda CRF150R 2007-2014 adhesive Designed with off-road riding in

Designed with off-road riding in mind

Athena delivers dependable fitment and consistent sealing trusted by off‑road enthusiasts worldwide

high-output 70cc powerhouse

Premium XR Lithium Ion pack provides up to 33% more capacity than standard 20V MAX battery packs

6 mm Tread Depth For better Static and High Motion Grip and Control

Athena P400210100023 163.5cc Big Bore Cylinder Kit (69mm Bore) - Forged Piston Performance Upgrade, Converts 150cc to 163.5cc, Compatible with Honda CRF150R 2007-2014 adhesive Designed with off-road riding inUPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low end torque, and unmatched acceleration from your 150cc four stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400210100023), a premium race proven package engineered in Italy to seamlessly convert your factory setup into a high revving, high output 163. 5cc powerhouse. Entirely cast from high grade aluminum and treated with a specialized Motor