I know this is posted in the wrong catagory, but I'm hoping it will not offend anybody as this problem could related to any 6v system. My '47 Chief will not run with the headlight on. 6v system. Will run with it on for 4-6- miles after initial start up then the bike begins to sputter like the timing is retarded or it's running out of gas. Turn the headlight off and she runs fine. New wiring harness. All connection checked, double checked, triple checked. I've tried 3 ignition switchs with no change. I've disconnected all other lights, the horn, etc from the ignition switch and reconnected them one at a time with no change. I disconnected everything from the switch and bolted all the connections together with no change. I've eliminated the Hi/Low switch, no change. Eliminated the horn button, no change. Changed out the coil, no change. New cut out, no change. Replaced the cap, no change. Wired the headlight bulb directly to the switch, no change. Gennerator is charging at 7v and the battery maintains a charge of 6.5v. In my mind I've run out of options, any suggestions will be greatly appreciated. Thanks in advance, Randy
P.S. I've got a sealed beam in there.