just threw on carbs, got rid of my EFI. My dealer says 430 is stock for my sled, but the manual says 360's. Now i opted for the rich one to be on the safe side, im also running black magic twin pipes, and unifilters. I started off with 470's for the weekend, and now im down to 440's which is as low as i have for jets. I dont want to just jump down to 380ish jets if its too lean to play it safe on a brand new motor. So what is your stock 98-00 600 running for jets?? From there ill know where to jet with the pipes, etc. thanks! and i know its a dumb question, but getting 2 different numbers from 2 different arctic cat sources.... sure does confuse me.