Ignition problem!! Plz help!

Well I just changed my handlebars and now the ignition switch will not light up green when I'm neutral nor will the tail light come on. I have no idea what's happening but if someone could give some guidance it would be greatly appreciated

Some electric control switches need contact to the main frame current grounding.
The frame is a part of the electric wiring.
If your new handle bar is powder coated and not chromed the electric current will not flow.
Scratch off some color of your handle bar at the mounting clamp area on the upper fork triple and controller body to get a good electric contact surface.