The air mixture screw changes the fuel mixture at idle speed, turn the screw in to make the bike run richer and out to make the bike run weaker.
It is recommended to stay within a range of half a turn to a full turn and a half from full in.
Available in a range of colours.
Replaces Keihin part number W1446-231-9900
Scorpa/ Sherco Part number: 1346