Does it have the "Polaris Creep"? Where it wants to pull as soon as you put it in any gear? If so, just buy a clutch repair kit from EPI. Comes with new sheave bushings, weight pivot bushing, buttons, and such.
Plus you may need to replace the bearing like pawngod said. Unfortunately I think thats a Pure Polaris part only. Both his and my suggestions are in the primary clutch only. Generally the secondary isnt a place for issues.
Also, if it is grabbing like we suspect, inspect your belt for wear and replace if questionable. A $40-100 belt could save thousands if it goes while climbing a hill.
The website shows $200, but something says thats crazy. I know thats EPI's website, but we've sold a lot of these at my shop and installed them. Thought they were cheaper than that. Check your local shop thats a Parts Unlimited/Tucker Rocky dealer.