K&S Technologies Carburetor Air Cut-Off Valve Set - 56-1033

Direct OEM-style replacement carburetor air cut off valve set
Include diaphragm, spring and O-ring
Located on the side of the carburetor the air cut off valve prevents lean fuel mixture (backfire) when decelerating
Temporarily closes the pilot jet airway to provide a richer mix as the throttle closes
Sold in sets for one carburetor