so i bought my first bike back in OCT. 2014. Shortly after i got the back i went for a short ride of about 30-45 mins, on the way back to the house the bike shut off and the battery was dead...I replaced the battery had no problem until a month ago, now it is doing the same thing. The catch is it will only do it when i am at speeds above 65 MPH. Any ideas please help me!!!!!