Fuel Mixture Screw for FCR Carbs. Allows for quick, easy adjustment with no tools needed to adjust on the track or trail. Product Details: - Condition: Brand - Qty: 1x Fuel Mixture Screw - Material: 6061-T6 Aluminum - Color: Available in Red, Green, Blue, Orange - CNC machined screw for FCR carburetors - Design secures adjustment setting - Numerically calibrated for tuning memory - Comes with spring, washer - Anodized finishing Fitment: Fits all FCR & FCR-MX Carburetors, fits most common 4-stroke models. Reference fit models as following: For CRF150R/CRF150RB 2007-2020 For CRF250R 2004-2009 For CRF250X 2004-2009 For CRF450R 2002-2008 For CRF450X 2005-2009 For KLX450R 2008-2009 For KX250F 2004-2010 For KX450F 2006-2009 For 250 EXC 4-Stroke 2003-2005 For 250 SX-F 2005-2010 For 250 XC-F 2007-2009 For 250 XCF-W 2007-2011 For 400 EXC 2000-2007 For 400 XC-W 2007 For 400 XC-W 2009-2010 For 450 EXC 4-Stroke 2003-2007 For 450 EXC-R 2008-2011 For 450 MXC 4-Stroke 2003-2005 For 450 SX 2009-2010 For 450 SX 4-Stroke 2003-2006 For 450 SX-F 2007-2011 For 450 XC 2008-2010 For 450 XC-F 2006-2009 For 450 XC-W 2007-2011 For 505 SX 2009-2010 For 505 SX-F 2007-2008 For 505 XC-F 2008-2009 For 520 EXC 2000-2001 For 525 EXC 4-Stroke 2003-2007 For 525 MXC 4-Stroke 2003-2005 For 525 SX 4-Stroke 2003-2006 For 525 XC 2008-2010 For 525 XC-F 2006-2007 For 525 XC-W 2007 For 530 EXC-R 2008-2011 For 530 XC-W 2008-2011 For 660 RALLYE 2001-2005 For OUTLAW 450 MXR 2008-2010 For OUTLAW 525 IRS 2007-2011 For OUTLAW 525 S 2008-2010 For WR250F 2001-2009, 2011 For WR426F 2001-2002 For WR450F 2003-2009, 2011 For YFZ450 2004-2009 For YZ250F 2001-2013 For YZ426F 2000-2002 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.