I dont know why my 04 Wr450 keeps blowing the bulb in the rear light, the tail light bulb lasts about one - two hours and the brake light lasts about five hours then blows. Is there something that I can check like places where the wires are well known to get damaged? How much power should I be getting to the rear light? I ride on the roads, dirt and supermoto so need a rear light to be legal !!! Changing the bulb every hour is crap !!! Help please.