Don't sweat it. A full clutch job you can do yourself for < $200 and a few hours, it's near as easy as replacing brake pads.
Mine was getting slippy @ ~100,000k's. I didn't realize at the time, but I'd done so much slow clutch-slipping dirt that it needed checking. Since a refresh was as easy as a check I installed new plates and springs. However it would have done another 20,000k's easy - in my case only the clutch springs really needed replacing and six 6mm washers on top of the springs would likely have cured all ills
Possible causes OTHER than a worn clutch, badly worn clutch snail cam, piles of crap inside the sprocket cover part jamming the shaft, cable part broken. (Broken wire ends catch in the sheath so it can't slide back properly).
I'd suggest - pull that sprocket cover off, clean it, remove, clean and grease the snail cam. Pull the clutch cable off and make sure it slips easily through the sheathe (and it should be VERY easy). I'd guess though that if it's slipping that badly it needs new innards now anyway since the slipping will have worn the fibre plates anyway.
If all inside the cover is O.K. and it still slips, just buy new springs and fibre washers, clutch bearing and gasket, oil and coolant and replace the clutch innards. NOT A HARD JOB.
Doing the oil change and radiator flush you end up doing as part of this is near as much work as the plates.
One comment. If you use Barnett parts (which are good) the clutch will drag badly for 2000k's after the refresh, run top spec. synthetic motorcycle oil until it all beds it if you have that problem.
Genuine 'zook parts shouldn't do that.
Either way, soak the fibre plates in oil 24 hours before install.
One of the plate sets is different from the others, so get hold of a manual, or look up the parts list online (Oneida suzuki used to have that page available). Taking pics on the way out isn't a bad idea either.