Carburettor air screw adjust and idling screw adjust with pulse engine tachometer
carburetor Air screw adjust engine Tachometer and Rpm and adjust
【Fitment】:Fits most Keihin FCR & FCR-MX Carburetors,fits most common 4-stroke models (Reference fit models as following).fcr air fuel screw adjuster
Air Fuel Mixture Screw CNC Adjust Carb FCR Air Screw Compatible with KEIHIN Carburetor Four-Strokes FCR Carbs Motorcross Motorcycle(red)
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