Athena P400485100030 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2005-2021 Hammer-Driver-Drill-Tool With a large 6

With a large 6

consistent line speed and long-lasting reliability under repeated heavy use

it helps keep engines clean by preventing varnish and sludge buildup

Featuring Polisport

0Ah LXT lithium-ion battery (BL1850B)

Athena P400485100030 144cc Big Bore Cylinder Kit with Cylinder Head (58mm Bore) - Premium 2-Stroke Performance Upgrade, Compatible with Yamaha YZ125 2005-2021 Hammer-Driver-Drill-Tool With a large 6UPGRADE 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