Top Quality Well CNC-Machined KIPA Carburetor, easy to install, Directly Fit, Improve throttle response for better engine performance, Pefect Idle and Top Accelerator Status, help to keep your Car running at Top performance. MPN: Replace for YAMAHA Part # 5TG-14101-00-00, Replace for Keihin FCR40 FCR 40mm Flat side Carb Fitment: Replace for YAMAHA WR400F 1998-2000 WR426F 2001-2002 WR450F 2003-2011, YZ400F 1998-1999, YZ426F 2001-2002, YZ450F 2003-2009 Specification: Main Jet 170; Pilot Jet 48; Air Filter Outlet Diameter: 55.5mm/43.6mm(O.D/I.D); Manifold Outlet Diameter: 49.9mm/40.0mm(O.D/I.D);Package Including: 1 x Carburetor. 1 x Fuel Filter. 1 x Cover. 4 X Main Jets.(#165, 175, 180, 185) 4 X Pilot Jets.(#45, 52, 55, 58) Manual is not included,But you could find a lot of installation video and manual on tube. Your Powerful Vehicle deserve A Perfect Carburetor. Fitment, It Could replace for Following models

Replace for YAMAHA MOTORCYCLE WR400F 1998-2000
Replace for YAMAHA MOTORCYCLE WR426F 2001-2002
Replace for YAMAHA MOTORCYCLE WR450F 2003-2011
Replace for YAMAHA MOTORCYCLE YZ400F 1998-1999
Replace for YAMAHA MOTORCYCLE YZ426F 2001-2002
Replace for YAMAHA MOTORCYCLE YZ450F 2003-2009