Motorcycle Air Fuel Mixture Screw for Keihin FCR Carb for Honda CRF150R CRF150R Yamaha YFZ450 YZ250F YZ426F YZ450F Kawasaki KLX450R KX250F KX450F Suzuki RMZ250 RAMZ450 Compatible with:for Keihin FCR Carburetors for Honda CRF150R CRF150R Expert CRF250R CRF250X CRF450X CRF450R TRX450R For Yamaha WR250F WR426F WR450F YFZ450 YZ250F YZ426F YZ450F For Kawasaki KLX450R KX250F KX450F Suzuki RM-Z250 RAM-Z450 Note: Please make sure the car's model if fit your car or not before you order