Fuel Mixture Screw for FCR Carbs allows for quick and easy adjustment without tools, suitable for on-track or trail tuning. Product Details: - Qty: 1x Fuel Mixture Screw - Material: 6061-T6 Aluminum - CNC machined screw designed for FCR carburetors - design helps secure adjustment setting - Numerically calibrated for tuning reference - Includes spring, washer and - Anodized finish Fitment: Fits all FCR & FCR-MX Carburetors, compatible with various 4-stroke models including: Model Year CRF150R/CRF150RB 2007-2020 CRF250R 2004-2009 CRF250X 2004-2009 CRF450R 2002-2008 CRF450X 2005-2009 KLX450R 2008-2009 KX250F 2004-2010 250 EXC 4-Stroke 2003-2005 250 SX-F 2005-2010 250 XC-F 2007-2009 250 XCF-W 2007-2011 400 EXC 2000-2007 400 XC-W 2007, 2009-2010 450 EXC 4-Stroke 2003-2007 450 EXC-R 2008-2011 450 MXC 4-Stroke 2003-2005 450 SX 20 2009-2010 450 SX 4-Stroke 2003-2006 450 SX-F 2007-2011 450 XC 2008-2010 450 XC-F 2006-2009 450 XC-W 2007-2011 505 SX 2009-2010 505 SX-F 2007-2008 505 XC-F 2008-2009 520 EXC 2000-2001 525 EXC 4-Stroke 2003-2007 525 MXC 4-Stroke 2003-2005 525 SX 4-Stroke 2003-2006 525 XC 2008-2010 525 XC-F 2006-2007 525 XC-W 2007 530 EXC-R 2008-2011 530 XC-W 2008-2011 660 RALLYE 2001-2005 OUTLAW 450 MXR 2008-2010 OUTLAW 525 IRS 2007-2011 OUTLAW 525 S 2008-2010 WR250F 2001-2009, 2011 WR426F 2001-2002 WR450F 2003-2009, 2011 YFZ 450 2004-2009 YZ250F 2001-2011 YZ426F 2000-2002 YZ450F 2003-2009 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.