I have a 2010 bearcat Z1 XT . When the machine was just a couple months old it started not burning fuel efficiently, it would leave big black exhaust tracks in the snow. It ruined my husbands bran new polar bear fur pants by leaving a big black exhaust stain on the right lower leg!! It guzzles gas like crazy. We live in Nunavut where no one here has the arctic cat computer to figure what is wrong with the engine. The dealer we bought it from in Alberta ( we flew the sled up) was no help at all. we called several other dealers and they were of no help either. We parked the machine for 3 years and just got it going again after doing repairs in the suspension. Anyone run into this problem or have any idea what might be wrong with it? It cost us $20,000 to get the machine here and it ticks me off that we have had nothing but problems with it and no help in getting it running as it should.