YAMAHA YZ 125 250 YZ WR 250 400 426 450 F KEIHIN FCR CARB FUEL MIXTURE SCREW BLACK BF25-none if you are running hand

if you are running hand guards on the bike

1999-2025 Yamaha YZ 125

2013-2024 Beta 250 RR

2007-2020 TM MX 144

YAMAHA YZ 125 250 YZ WR 250 400 426 450 F KEIHIN FCR CARB FUEL MIXTURE SCREW BLACK BF25-none if you are running handAS3 Performance fuel mixture screws allows you to adjust the fuel mixture setting on your carb quickly and easily without the use of a screwdriver and can even be done track side if needed. Simply rotate the head of the screw to set it to your preference and you can easily keep track of adjustments with the 1 4 number system on the side of the head. Will Fit Universal fitment on all Keihin FCR carbs Features Easily adjust your fuel mixture setting by