FITMENT: For YAMAHA YZ250F 1998-2005 For YAMAHA YZ400F 1998-2005 For YAMAHA YZ426F 1998-2005 For YAMAHA YZ450F 1998-2005 For YAMAHA WR250F 1998-2005 For YAMAHA WR450F 1998-2005 For YAMAHA YFZ450 2004-2013 SPECFICATIONS: Condition: 100% Brand New Material: Aluminum Replace OEM Part NO.90338-18064-00 DESCRIPTIONS: -This plug replaces the stock rubber one that easily falls out because it is just glued in place. Over time, you oem rubber plug will fall out and hopefully you notice it before its too late. -This plug goes where the earlier 4 stroke models had a manual decompression system, when Yamaha changed to an automatic system they never changed the head casting and just put a rubber plug in there. -Installation is easy, remove the set screw, pull out the rubber plug, pus.
