Noticed that when i press my horn the rev counter shoots up!Its been on the bike for a year and important not sure it its always done this or not. Bike is a wr450 '03. Also recently my horn has started sounding really weak even though its only a couple of months old, could this be related? Lastly my led on my ignition button doesn't always come on either, it used to be fine. I thought a flat battery might be at fault but the charger gives it a green light?