DescriptionThese kits give your bike a performance boost.Kits include all necessary parts for a complete top end service/ rebuild: pistons, piston rings, piston pins, gaskets, valves and valve springs.Pistons fully machined from 2618 aluminum alloy with a performance skirt coating.Black Diamond or White Diamond engine valves (depending on application).Lightweight racing valve springs kit with titanium valve spring retainers, dual springs and H.T. steel base washers (springs are suitable for use with high-performance cams).All necessary gaskets, seals and O-rings included.Sold as a complete kit.This item fits the following vehicle applications:compatible with Honda CRF250R 2004-2007compatible with Honda CRF250X 2015-2017compatible with Honda CRF250X 2012-2013compatible with Honda CRF250X 2004-2009