My ext starts running like crap when temp drops below zero. tried about everythingto figure it out but no luck so far. it'll start to miss really bad(cuts in and out). For some reason the slides on the carbs start to ice over. ive took the tank completly off and drained the fuel and let air dry in the garage for about 5 or 6 days tried running iso propelene in the fuel, running nav gas. the nav gas seems to help because it comes with a de-icer blended into the fuel. but i dont carry it along with me. was told to become the lead rider but somebodys gotta babysit the crowd i ride with. somebody else told me that it was an arctic cat design flaw and that year always had that problem any help hear would be great. bang your head . starting to get frustrating awesome running sled when the temp stays above zero