Yeah well it does sound like a flat battery problem, though Dave's suggestion it could be mechanical or fuel is quite apt: it's been known to happen. I trust this thing isn't overheating to near seize ? Some of your other observations suggest battery though.. A simple way to check your charging system is putting out enough(or some) current, is to connect your gauge to check the voltage, it should be above 12.4 after an hour off the charger and with everything turned off, then start the engine and check the voltage goes to the 14.5v at 1700revs after a minute or less, then turn your headlights on and check the voltage stays over about 13.5, if it drops below that voltage, give it a few more revs and see if it can get to 13.5 with the headlights on. If it can run the headlights and still keep the battery voltage up to the minimum charge voltage(13.5), then the charging system is working and should be fine when you aren't using any of the extras such as lightbar. It's also a good idea to check the voltage at different revs. Some bikes go up to 14.5 volts just above idle, then the regulator cuts in and regulates them to 13.5, and at anything above just about clutch engaging speed, they stay regulated. You may have a fault like that, but with a defective regulator draining or cutting all current at higher revs. If it can't keep the voltage up to 13.5, under the load of the lights, at all revs, then there is a problem with the charging. If the charging is fine, perhaps it takes about an hour before some electronic component gets hot and causes an issue. To test that, you could run the bike with the headlights on, and see if it runs flat quicker than the hour. If it stays running for the full hour, then dies with a flat battery, then it would point to the heat effecting the electronics. If it dies sooner with the headlights on, then it's not charging enough.