Each kit contains piston or pistons to rebuild one caliper. Brake Caliper Piston Kit. Kawasaki KX125 1997-2000. Kawasaki KX250 2-Stroke 1997-2000. Yamaha WR250F 2015-2021. Yamaha WR450F 2016-2020. Yamaha YZ125 2008-2021.
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