All the internal parts of the carburetor are made of 303 stainless. The carburetor meters fuel automatically as the barrel is closed & has a .0625 dia. stop pin in the outside of the rotating barrel which engages the machined circular grove in the .032 thick side plate. This feature controls the full open & closed positions. The needle valves have precision ground tapers & are made of 52100 full hard steel gage pins. The needle valve retainer spring is made of fully hardened beryllium copper. A new design needle valve is being built which will eliminate the problems associated with non-concentric tapered needle valves.
