I recently aquired a 98WR400. Both the headlight and tail light bulb were blown. I put a replacement bulb I had for my DRZ4 in it. It lit up but blew out when I reved the bike up. Now my question is this, it does not have a battery so therefore it has no rectifier to convert from AC to DC. I wonder if there is a different bulb for AC tail light than there is for one with a battery that uses DC.