Hmmm, used to snowmobile with the same crew back in the day I think. Would love to but I am in the middle of a move and everything is a big ol mess. LOL. I am running 5wt in my 2011 and shimmed for it. Zoke in 11 came with 10 wt I believe. I personally like 5wt as it flows better in colder winter temps.
How much sag is in your front end? You should probably not have more than 2" of static/no rider sag. I like to see about 2-3 inches rider sag. It is hard to measure and you need several to get an average. If you have not done this before and have issue's you can call me if you wish 880 6885.