Yep, you'll need a puller. If the primary is in this shape, the secondary may not be far behind. If you start a new thread asking for help, you MAY get someone local to you with all the tools and experience to come give you a hand, but don't expect it. This all depends on how much you want to spend on that sled. If it were me, complete rebuild. If you decide to just do bits and pieces, item numbers: 6,7,8,10,11,15,16,18,26,28,30 are all wearing items.
http://www.yamaha-motor.com/sport/parts/home.aspx
follow the three steps at the top. "Primary sheave" will give you the item numbers from above, "clutch kit alternate" item #24 is a rebuild kit and gives you parts to rebuild the rollers plus the two bushings. It does not include the spider slides or weight bushings/parts. I'd be concerned about the flyweights from the look of those rollers.
If you don't get a hand from someone here, you may be better off having the dealer look at it. You'll probably need him to seperate the spider any way(specialized tool).
The $$$ could add up quick, depending on how far you go, make sure you price all the options, including a good used clutch.