The piston, rings, valves and pin clips in this kit are designed to work together as a system. They are NOT COMPATIBLE with Factory components and should ONLY be used with the components in this KPMI Top End Service Kit..
These 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 replacement 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 replacement valve springs kit with titanium replacement 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:
2007-2009 fits YAM WR450F
2011-2015 fits YAM WR450F
2006-2009 fits YAM YZ450F
WARNING: 