I picked up a 71 g4tr. I have it to the point where it starts and runs great,but as soon as I plug a turn signal flasher in and turn on signals,the neutral light flashes,and won´t stop until I turn key off. I never had a bike do this before.. If I unplug the flasher the neutral light works as it should. Any body have input on this? I´m not even sure if signals were even on these bikes when new???