Slow Running Mixture

[cb750]

On fireblade keihin carbs does the slow running mixture screw add more fuel to the mixture when turning it anti-clockwise or does it add more air? I would expect it to add more fuel but I ask because I have had some carbs where the screw alters the volume of air

[knights_templar]

http://www.carbparts.com/keihin/needles_tuning/jetting_your_carb.htm

 

any use?

[cb750]

Thanks for the link, I'll check what model number they are and have a good read after swmbo has gone out to have her hair done!