OK Guys, I have searched all over, and I have not been able to find any info on how to adjust the stock clutch setup on an 07' H1 for optimum performance. I keep hearing that adjusting the secondary clutch,(shimming) will help with belt wear, holeshots, and overall performance. I just added 28" mud tires and I currently have it in pieces, because I made a 2" snorkle for the intake, and while I wait for my Dynojet kit to show up wednesday, I figured this may be a good time to play with the clutching. I will also be using the bike to plow with and trail/mud ride. Should I change springs too? I hear it's nothing like a snowmobile setup, so I will probably be in the dark...There's only one way to learn, right? :thumbsup: Thanks! -Craig P.S., Where should I start out as far as jetting goes with the Dynojet kit? Stock exhaust, 2" snorkle, 500-1,000ft. elevation, and temps between 20*-30*f., and should I lean it out 1-2 sizes, come summertime?