Issues after installing Vandemon slip-ons

[VRock]

I installed the Vandemon slip-ons (non e-valve) this on my 23 GT and the bike ran good and sounded great. After an hour I stopped for a break and when I attempted to start it the issues started. When I turned it on it showed no fuel in the tank (still had half a tank or so) and when I attempted to start it I got nothing and then the instrument panel went blank. Felt like a bad battery but after the third attempt it actually started saving me a tow. After a few minutes the fuel alert went away and it showed the proper fuel level. When I got home I turned it off and attempted to start it again a few times with no luck (it showed no fuel again). I put it back on the tender and a few hours later checked the battery terminals and the battery voltage which was good (battery was replaced by the dealer around 6 months ago). The bike did start (still showing no fuel) and idled for a few minutes before the engine just stopped running. During that time I noticed that the headlights were flickering. I did connect a OBDlink LX and it did not show any error codes. I suppose it could be unrelated to the new exhaust, but the fact that this all started on it's first ride after the install is suspicious. If I somehow damaged the O2 sensor would it have this effect on the bike? I don't have a ton of faith in the dealer's mechanics as they didn't know that the quick shifter had to be enabled/configured once they installed it... Any advice is highly welcomed!

 

[atomsplitter]

Reads like you have a sketchy ground. You might try cleaning the connection of the battery's negative terminal to frame and see if that alters the behavior.