QUOTE (Slytly-Stok @ Nov 12 2009, 11:10 AM)

The two shops mentioned above are probably the most popular and appear to have the best results. But if you haven't even ridden the sled yet, I'd wait and try out the stock clutching first - Doo did a VERY good job on the 09 clutching in stock form. If you're coming off a 600 polaris you'll be pleasantly surprised with the stock 09 clutching. I found that just throwing a couple grams of pin weight at stock clutching (if your sled will pull it) makes a pretty good improvement.
OR - If you have $$$ burning a hole in the pocket and just need to spend it on something, then I'd go with either Dunn or Howard. Heard some good reviews on the shockwave helix also, but that route would probably involve some testing and tweeking to get it right for your application. The others are most likely pretty close to plug and play ready.
Im planning on riding it for a while first, but just want to get some ideas on what works the best.