Bought a 2000 MM 700 last year and took it to the U.P. of Michigan. I have two Vipers, 03 and 04, so knew to clean the carbs before taking it out. Ran good for the most part, but seemed to bog about mid throttle. I noticed it more when cold, -10 to -15F. Felt like it ran better mid day when the temps came up a bit. Checking the plugs, it was running lean... not a nice coffee brown as they should have been. Looking at the elevation of where I was riding, I was at an average elevation of 1,400 ft. About to take it back up there in 2-weeks and looking for some advice. Thanks!