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I have a 2006 M7 with a Speedwerx pipe and can. I just came from riding in West Yellowstone and it started doing it out there. Above 7000 rpm it just runs like crap, it will pull through up until 8000-8100 but just really rough. Occasionally under heavy load in deep powder, my sled just decides to bog/miss/spit and sputter out on me and then I end up getting stuck. I am currently at low elevation in MI. I cleaned my powervalves just to make sure those weren't the issue and that didn't do anything. Any suggestions?