Help, not real sure whats up. Cruising down the road and the engine will stutter, kind of stall and then come back around. Will do fine once at a steady speed most often. Seems to be at lower rpms. Seems as though I remember something about a filter in between the carbs that is not often known about. Before I tear them apart I am open for suggestions. Plugs look good, it's ridden or at least started 1 or 2 times a week.Thanks