i have an 05 10 and my bike hasn't always done this, not quite sure but think it started doin it about the time i put my new motor in. I always ride with my brights on so this is the only way i can tell that it happens. but every once in a while when I hit a big enough bump my headlght will go off. i can only tell cuz my brightlight indicator will go off. and i have to slow down to exactly 14mph and it will come back on. does anyone have a clue why this might happen?