Athena P400485100029 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 1997-2004 DOMANKI Precision laser-cut for perfect OEM

Precision laser-cut for perfect OEM fitment on all KX450F and KX250F models from 2006-2024

intelligent charging solution designed to power Makita

and a pivot system that folds outward to prevent breakage during crashes-all with fast

over-discharge

Athena P400485100029 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 1997-2004 DOMANKI Precision laser-cut for perfect OEMUPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low end torque, and unmatched acceleration from your 125cc two stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400485100029), 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 specialized Motor