My wifes 05 trail boss has some sort of ignition/electric issue. After about 1/2 hour of riding the atv will die. The first couple times it does this, it will fire right back up when you turn the ignition. Eventually it gets to a point where it goes completely dead. When you turn the ignition nothing happens like the battery is disconnected. Even though lights and brakes still have power, but no gear indicator light. Once it cools down it fires right back up. I originally changed the ignition switch thinking there was an issue. Still had problem so changed ECM, $200.00 later still does the same thing. Could this be a CDI or solenoid issue? ATV runs great before this starts. Any advice would b GREATLY appreciated, Thanks