Athena P400485100101 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2022-2026 Roof Mount providing 4

providing 4

Easy to install and reusable

LSL and OSL

The Evolution Series 4 Disc Lock

and debris while maximizing engine airflow for superior power and throttle response

Athena P400485100101 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2022-2026 Roof Mount providing 4UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low end torque, and unmatched acceleration from your modern generation 125cc two stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400485100101), a premium race proven package engineered in Italy to seamlessly convert your factory setup into a high revving, high output 144cc powerhouse. Entirely cast from high grade aluminum and treated with a