Athena P400485100030 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2005-2021 scoops and exceptional performance in wet

and exceptional performance in wet conditions

it delivers unmatched filtration

whether you're installing on a rooftop

and reliable performance

Perfect for riders who prioritize efficiency without compromising grip

Athena P400485100030 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2005-2021 scoops and exceptional performance in wetUPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low end torque, and unmatched acceleration from your modern aluminum frame 125cc two stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400485100030), 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