Hey, Ur CDI should be changed, Also U should change ur jets, mine are at 440. Both were done to my sled by the dealer. Check the Updates page on this website. U can check the numbers on ur CDI with ur dealer. And i think ur right about the gears u want. Something about gear ratios so our sleds need a bigger top and smaller bottom. My gears are 25/40 stock. So u can put on 26/39 without needing a new chain. The best mod for ur buck is SLP single ceramic pipe and ceramic silencer can. Just go to mcbpreformance.com and look at all the optins for ur sled. oh yea and smoke those skiducks. hehehe