Sorry I don't know for that bike. epiperformance was my first guess. I bought my clutching needs from Rick at RitterCycle.com. His website is not good, but I have talked to him several times on the phone about clutching for our 250's.
I'm sure someone can chime in here as far as clutching goes for the 330 and point you in the right direction. Let me know because I have a 325 that I wouldn't mind clutching

...I just haven't looked into it far enough.
Also, if you are on the cheap, we were able to just swap the front springs in our 250's, which we got from Rittercycle...about $20. Much cheaper and easier than other kits where you have to pull both primary and secondary clutches apart to replace pieces.
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2012 Sportsman 500, Red.
Highlifter HD Springs all around, Moose pregressors on front (not activated). EPI 'patv1' primary clutch spring, UNI air filter w/ PJ-1 oil. K&N Model KN-303 oil filters. Bikemaster foam grips.
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My ATV-GURU bumpers ARE FOR SALE, front and rear, BRAND NEW. Me a reasonable offer and they are YOURS.
(As you probably already know, they are currently unavailable from TheAtvSuperstore.com /ATV-Guru for an undisclosed amount of time).
http://www.polarisatvforums.com/foru...500-800-a.html