We are currently out here riding and found my brothers sled which is a 2002 rmk 800 to operate with 10-60 weights in the primary with the stock springs in both clutches. And for jetting we found the mains work good as 350 with the needle clip in the #1 position with the washer on top. I am not saying that it will work for you but it seems to be working perfect for us.
We are on our way out when are you leaving. How's the snow?