I agree with letting the dealer fix it if you're under warranty, but the more you can troubleshoot beforehand, the less they'll F around with it.When cruising the bike at a constant speed, let's say 85mph, all the lights would dim and my speed/rpm would drop down 3-5mph, like its "dying", but would quickly return back to normal. Then again seconds later, it would "die"(lose power) but then would return back to normal.
The ignition switch is a common link in all the circuits affected. Check the wiring behind the switch, and try wiggling the key with the bike running. Having extra stuff hanging off the key can cause premature failure.
Also check that the main (30 A) fuse and battery connections (including ground cable) are tight.