Why is my clutch plates slipping on my 07 Vstar with only 10,000 miles

The leaver at the clutch housing may not be releasing fully or the clutch drive plate may need replacing .

How motorcycle clutch works very interesting motorcycles

The cable is probably too tight,andnot allowing the pressure plate to use all of its clamping force. This will also wear out the new release bearing.

Try tighten cable adjusters, check cable for damage, check the clutch release arm for damage, if thats ok its worn clutch plates replace the clutch plates and check components for damage,

I AM NOT SURE OF YOUR QUESTION BUT I NEED TO KNOW HOW MANY MILES ARE ON IT..........NICE BIKE....THEY ARENT HARD TO ADJUST .(.IF IT IS ADJUSTABLE)..ON THIS MODEL YOU SHOULD BE ABLE TO ADJUST THE CABLE..BUT IT COULD BE THAT THE CABLE IS STRETCHED...I HAVE SEEN THIS HAPPEN....ALSO WITH A LOT OF MILES YOU MAY NEED A CLUTCH...THE CABLE IS KINDA LIKE LINKAGE ON A VEHICLE...INSPECT THE CABLE AND LEVER ASEMBLY...IF LOOKS TO BE OK ADJUST CABLE FIRST...BEFORE YOU SPEND MONEY FOR CLUTCH REPAIR...THE CLUTCH JUST HAS A LOCK AND ADJUST NUT ON SOME MODELS....BUT SOME ARE NOT ADJUSTABLE.....ONLY AT CABLE.........HOPE THIS HELPS..............METALPOET.....

This can happen if you used the wrong oil. Is the clutch cable or hydraulic operation. If cable then it may be dry or adjusted too much (needs a little free play at the lever. Not sure of your knowledge so starting with the basics. How many Kms has it done.

adjust your clutch cable so that you have a bit of free play in the clutch lever. After adjustment, If the clutch engages (grips) at the very end of clutch lever travel then it might be time for clutch springs and plates.

Sounds like the friction material bonded on the friction plate are coming off, time to do a clutch job.

If I recall correctly, the VStar engage/disengage point cannot be adjusted in terms of where in the range of the lever it is, something is not disengaged correctly. This typically indicates that there is too much freeplay . Reduce the freeplay just a tad and see if it resolves the problem.
clutch cables stretch with use and the adjustment at the clutch lever must be made on occasion. If there is no more adjustment at the lever, then follow the cable down and see if another adjustment is available. If not, you'll need to remove the cover to the clutch basket and find the adjustment there.
Now, just another thought. Bikes that have correct freeplay, but want to clunk and creep, may have sticky clutch plates/tension springs. This can happen when the oil is old or the bike has been sitting for longer intervals (previous owner?), or simply stuff accumulated and stuck to the plates. Not the most likely thing with your mileage, but don't completely rule it out.

It is possible, but really depends on how the bike was treated for those 11K miles. One thing you should check is that the clutch cable is properly adjusted. There should be some free-play at the clutch lever - see the owner's manual, but the first 1/4" or so of clutch lever movement should do nothing except take up slack out of the cable. Insufficient free play at the lever will cause the clutch to not engage fully, and slip.