What exactly is the issue? Is the bike hard to start in gear? That's normal for a wet plate clutch. Is the clutch engaging/disengaging too early or late? That should be an adjustment at the lever, or it could be too new of a clutch and needs to wear in. Is the bike hard to push around when in gear and not running? Again, it could be that the plates are too new.
Automotive motor oil will cause the clutch to drag as well as the fact that your bike is still wearing in (as F5 mentions). Try another oil, such as ATF or a blend of ATF and motor oil. I prefer a 75/25 blend of 10w30/ATF. Even a 90wt gear oil (or 80) might work for you. I would suggest riding the bike for a few hours and see how it does.
Not be dismissive, not at all, but a new bike might need some time to fully settle in. For example, the suspension requires about 10-12 hours to really "break in," so go and ride it and see if the clutch changes.
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Phil
(New bike pending...)
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