I have two '06 800 rev's and my wife was wanting to go to Michigan this winter to go ride with her family. Well we live in Wyoming and ride here at the elevation of 8000 to 11000 or so. Someone told me that I have the DPM in my machines which is true. They told me it's just like EFI and I can take them down to 1200 to 2000 ft. above sea level. I don't think this is right, I'm not a mechanic but i think I would have to rejet the sleds to that elevation. So is this true or what?