Fuel Mixture Screw - TX650 - XS1 - XS2 - XS650 - 1970-1975

Fuel Idle Mixture Screw - (256 type) Fits:XS1/XS1b/XS2/TX650/TX650A/XS650B (1970-75) with Stock Mikuni BS38 CV Carburetors.Beware!Carb idle mixture screw O-Rings included may or may not fit correctly in your Mikuni BS38 CV stock carburetor. The O-Ring in the carb as originally supplied by Mikuni/Yamaha varies in fit and size and we have found it impossible to match or guarantee a proper fit. No alternatives can or will be supplied. The mixture screw and matching O-ring was never sold or supplied by Yamaha or Mikuni.