Have you been riding in hot weather? check the gas to see if its boiling. Our's does the same thing. (vapor lock)Grizz, my grizzly just started sputtering the other week. Its never done this before but the other week it just started cutting out at about 21 mph. It sounds kind of like its backfiring and cutting out at the same time. Its rideable but it kind of sucks when you try to gas it. Anything you can contribute to help out again?
I changed the plug out today but still the same. The plug color was a whiteish color. I also dielectric greased some connections. Any advice?