Yes, the oil plays a roll. Fully synth motorcycle oil will make it better but if you have more power than stock the clutch might slip. Ester type oil like Motul semisynth might stop the slipping but you might get more chatter.
BUT, there was a design error on the 2001 clutch center. The rear trust surface was too narrow so the aluminum center got worn with time and then it started to chatter, I got mine replaced for free and all was well.
You can see the old and new design in this pic
http://www.stabbarps-auto.com/images/clutchchatter.JPG
[ This message was edited by: jojje1963 on 2005-10-13 19:48 ]