EX ER KLE Versys-X Z 250 300 400 Z250SL EX250R Front Sprocket ENGINE SPROCKET matched Fit For Kawasaki EX ER KLE Versys-X Z250 Z300 Z400 Z250SL EX250SL engine output shaft drivetrain system Direct bolt on installation; no or extra required during chain carbon forged body with quenched tooth surface; effectively reduce tooth abrasion during daily highway touring riding Standard inner spline size consistent with engine shaft; ensure stable power transfer without slipping or vibration Uniform tooth spacing matching standard drive chains; avoid chain jump abnormal rattling noise under heavy load acceleration