I'm thinking of getting an 02 KTM 520sx to use as a dirt bike in the summer and snow bike in the winter. But I have been told you really need a fuel injected bike in the winter to deal with the elevation changes and high alpine in colorado, is that true? I have a lot of experience with sleds and dirt bikes but not snow bikes. I don't need the latest and greatest but something capable, defiantly would be boon docking and not trail riding. Probably 8000-1200 feet.