CNC Bored to .625" AND using a special E-Tube and other unique parts available only with ARC carbs, this carb is tuned for use with gasoline. Airflow has been significantly increased by opening and reshaping the Venturi using a CNC machine - the same technology we use to bore our connecting rods.
You will need to adjust the black plastic phillips head idle speed adjustment screw to set the idle speed on your engine to approximately 2000-2200 RPM.
*** Not designed for gravity feed applications. Call for more information ***