Motion Pro 11-0095 Fork Bleeders for Yamaha WR450F 2009-2017 For use on most K.Y.B. inverted forks with a M5x0.8 air bleed screw in the fork cap New ultra-compact, low profile design is only 11mm high installed Stainless steel body is stronger and will not corrode / Allows bleeding of air pressure without tools Easy to install, simply replace the Original bleeder screw with the Micro Bleeder Kit includes two bleeder valves / Fits Yamaha WR250F / WR450F 2009 - 2017