My 5th gen is making a strange sound. It only makes the sound when the clutch is pulled and the bike is on gear. The sound seems to come from the area around the head stock. It sounds like electrical crackling or shells from pecans. It only happens with the clutch pulled and the bike in gear. I listened with a stethoscope but found nothing. I guess I need to check the air cleaner for nuts but you would think it would make the sound all the time.