What kind of oil are you using? It is common for a clutch to slip if you have used an oil that is not made for motorcycles with wet clutches, or used an additive that is not suitable for wet clutches. Anything with "Friction Modifiers" is a problem.
Have you tried the Search Function or looked in the Technical Section?
Here is a link I found in the Technical Section Index that explains how the clutch works and what goes wrong with it.
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1270678838/0