Well...the EZ-Just Mixture Screw that is...
http://www.harley-performance.com/ez-just.html (http://www.harley-performance.com/ez-just.html)
Just added a set of these to my '98 - have the Keihin carbs you know...just like the big dawgs!
Needless to say - they fit and work like a champ! Very cool if you can use them. :D