09-16 KAWASAKI KX250F: Acerbis Chain Guide/Slider Kit 2.0 (BLACK) The Acerbis Chain Guide / Slider Kit is the perfect solution for replacing the high-wear area of your bike's drivetrain. Includes: Acerbis Chain Slider: Quality replacement for the stock swingarm-mounted chain slider. Meets or exceeds O.E.M. specifications. Acerbis Chain Guide Block: Easily replaces the entire O.E.M.