ProTaper – ProTaper Front Sprockets - Kawasaki, including 12, 13, 14 and 15 tooth countershaft sprockets for KX125, KX250F and KX450F, plus shared Kawasaki/Suzuki and Cobra fitments, lets you dial a KX in for the track in front of you instead of settling for stock gearing. One tooth at the front is a big move, which is why racers keep a 13 and a 14 in the toolbox: the smaller size wakes up bottom-end drive on tight, technical circuits, and the larger size calms the bike for fast, flowing layouts. Applications cover 06-18 KX450F and 06-18 KX250F four-strokes, 92-05 KX125 two-strokes, and multi-fit Kawasaki/Suzuki and Cobra patterns down to 12 teeth for mini machines. Each sprocket is cut from hardened steel with a chamfered, precision tooth form that keeps chain wear even across the run and helps protect the countershaft splines from rounding. Gearing that suits the terrain also lets the engine live in its strongest rev range, which cuts clutch abuse and rider fatigue over a long moto. A crisp ProTaper front sprocket brings back sharp acceleration, smoother chain travel, and gearing you can adjust in minutes with basic tools.