The screw adjustment is clockwise (CW) leaner, CCW richer. I've attached a link to the Tech section for Lancer's carb tuning.
Things to note, With engine off, find where it's at now. Turning it in, count the turns in till the mixture screw (needle) seats. I usually do it in half turns. The screw is brass so don't try to "tighten" it. Only make contact.
Also, if bike hasn't been run in a while, drain the gas (tank & carb) and put in fresh gas. In cooler weather it can make the world of a difference. Also, remember to set petc0ck to pri (prime) for a bit.
http://suzukisavage.com/cgi-bin/YaBB.pl?board=tech;action=display;num=1157720585