I just recently bought my first XR. It's an 1986 XR600R, got it for cheap, and it runs great. I noticed the headlight and rear light aren't working. I replaced both lights, started up the bike and woulden't you know it they were on and shining bright. They worked for about 5 seconds then promptly burned out. Whats causing the headlight burn out? I replaced the lights again and the same thing happened. I'm wondering what might be causing this, and what to check for. The bike is all stock and I was using the 35w headlight bulb. Any help would be much appreciated! Thanks.