What does the ICM do and how do you tell it's faulty? My bike starts right, runs great .Codes are clear. When riding, lets say at 50mph, all of a sudden I feel it drag alittle then the engine light comes on. Still runs good but I can feel it. A mile or 2 down the road light go out and all is good. I stop to pull codes and they are all clear. Mind you my ignition system is 12 years old with about 350,000 miles under my belt. I am totally stumped. Any insight would be a great help.