Athena P400485100101 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2022-2026 Hard Hat Batteries are designed with on-board

Batteries are designed with on-board fuel gauge which displays the run time and can be used in cold climates below 0 degrees Fahrenheit

this filter is the trusted choice for keeping your KX65’s engine clean and powerful

so the LEDs never need to be replaced

Impact-resistant 5-point reinforced frame

7L Cummins platform

Athena P400485100101 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2022-2026 Hard Hat Batteries are designed with on-boardUPGRADE 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