Specifications：High-concerned chemical:None：Origin:Mainland China：Material:ALUMINUM：Item Type:Carburetor：28 30 32 34 38 40mm Lectron High Velocity Adjustable Power Jet Carburetor with Cable For Yamaha YZ250F KX250F RMZ250 CRF250R：The carb slides work in conjunction with an increased bore taper to create more air flow (CFM) at low throttle positions. This generates higher velocity, more fuel lift, and a faster, torquier hit immediately off idle without being snappy or uncontrollable. The higher velocity also activates the power jet earlier to create a stronger, more tunable mid-range.：New mold with 60% more aggressive venturi and redesigned bell：Improved slide design：Earlier power jet activation：Double the idle adjustment：Lighter throttle pull：Shorter overall carb length：Simple design, doesn't incorporate multiple jets：Fitment:：For KTM：250 EXCF 2002-2005/2007-2011：250 SXF 2006-2010：400 SX / EXC 2000-2002：450 EXC 2008-2011：450 EXC-R 2006-2007：450 SMR 2006-2007：450 SXF 2006-2012：505 SXF 2008-2009：520 SX 2000-2002：525 EXC-R 2003-2006：525 SMR 2005：525 SX 2003-2007：530 EXC-R 2008-2011：540 SXS 2006：640：660：For Husqvarna：TE 250 4T 2005-2007：TXC 250 4T 2008-2009：SMR 450 2005-2009：TE 450 2005 -2009：TXC 450 2008-2010：TE 510 2005-2007：TXC510 2008-2010：550 ALL：SM610 2006-2007：For Husaberg：250 ALL：390 ALL：FS / FE 450 2004-2008：501 ALL：510 ALL：FS / FE 550 2007-2008：570 ALL：610 ALL：FS / FE 650 2004-2008：For Beta：350 ALL：400 ALL：430 ALL：480 ALL：498 ALL：For Yamaha：YZ 250F 2003-2013：WR 250F 2003-2013：YZ 400F 1998-1999：WR 400F 1998-2000 2003：YZ 426F 1998-1999：YZ 450F 2003-2009：WR 450F 2001-2011：For Kawasaki：KX 250F 2004-2010：KX 450F 2006-2008：KLX 400：KLX 450：KLR 650：For Suzuki：RMZ 250 2004-2009：DR 350 1994-1999：DRZ400 2000-2023：RMZ 450 2005-2007：DR 650 1996-2014：For Honda：CRF 250R 2002-2009：CRF 250X 2004-2019：CRF 450R 2002-2008：CRF 450X 2005-2019：Chinese bike NC250 NC300 NC450 4T：GPX FSE 300R 450R (The carburetor can be installed by replacing the EFI system)：SSR SR250S SR300S SR450S：ACELLERA ACX 250F 300F：MXF 250R 300R：MORMAII VT 250R 300R：TOKENS TXR 250 300：BOSUER BSE M4 250 300：GR7 F250A F300A 4T：ZUUM CX250 300 NC：CROSSFIRE XZ250RR XZ300RR：CROSSFIRE RM250 RM300