Yamaha 1999-2017 Yamaha YZ250 Cylinder Works 72mm Big Bore Exhaust Valve 99-17 YZ250 - CW-PV-K02 Cylinder Works Exhaust Valve for standard bore YZ250  99-17 (66.4mm)   Included Items:  
(1) Power valve   Yamaha 2015 Yamaha YZ250 2014 Yamaha YZ250 2013 Yamaha YZ250 2012 Yamaha YZ250 2011 Yamaha YZ250 2010 Yamaha YZ250 2009 Yamaha YZ250 2008 Yamaha YZ250 2007 Yamaha YZ250 2006 Yamaha YZ250 2005 Yamaha YZ250 2004 Yamaha YZ250 2003 Yamaha YZ250 2002 Yamaha YZ250 2001 Yamaha YZ250 2000 Yamaha YZ250 1999 Yamaha YZ250