Renthal – Front Sprockets - Kawasaki - 520 Pitch, including grooved front sprockets for KX 125, KX 250 and KX 450 models, KDX trail gearing, and 12 through 15 tooth counts, this is the gearing shelf Kawasaki riders raid first when a bike feels flat off the bottom or busy at the top. Every countershaft sprocket here is cut for 520 pitch chain and machined from hardened steel, with the grooved tooth profile that helps shed mud, sand and grit instead of packing it into the rollers. Because the front sprocket multiplies its effect on final drive, moving a single tooth changes acceleration far more than a rear swap, so a 13T in place of a 14T sharpens corner exit drive on a tight supercross-style track while stepping up a tooth calms a KX down for fast, open desert and GNCC-style terrain. Fitments run from the 96-97 and 03-08 KX 125 through the 06-23 KX 250F, KX 250X and KX 250XC, the 13-23 KX 450 and KLX 450F, plus the 84-94 KDX 200 and 97-06 KDX 220. Precise tooth spacing keeps chain wear even and the drivetrain quiet, which protects the chain, the rear sprocket and the countershaft seal over a long season.