Hello I just recently bought an Arctic Cat 440z for $600 with 3700 miles on it. The previous owner used it to get to his cabin at 8500ft in elevation. He also used C12 racing fuel for the elevation. My question is i'm asuming he had changed the jetting in the carbs. I dont want to run the C12 racing fuel b/c it burns to hot for a fan cooled engine. I also did a compression test and got 130 psi cold on both pistons. Another question I have is at 3200ft it drove on to my trailer and ran fine (where I bought the sled) I live at 97ft elevation sled starts and idles fine but when I give it gas it dies. And one carb boots to the airbox is cracked and needs replaced. Also where the main jets are on both carbs theres 1/4" tubing that stubs down like 6" with a plug. It doesn't appear to be stock. Any help will be greatly appreciated
I will post some pictures later.
I forgot to mention that I'll be running the sled between 5500'-6500' elevation and -20_0 degrees