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11 600, need some ideas on what to check. Between 5600 and 5900 the sled has a horrible bog, almost like one cylinder quits firing, past that it runs awesome. It was doing it towards the end of last season but it is more noticeable now that I put an slp single on it. I'm going to put on a new fuel filter today but wanted some other ideas. Sled has about 550 miles on it now.