I believe user error is the most likely culprit; such was with me on two occasions. I thought the bike was fully off, but the headlamps stayed on. First time I did not notice and did not find the error for a few hours, the battery was way low. I recharged with my Deltran Tender. The second time I did notice, was looking (still do look) to make sure. My habit in returning from ride is to idle into garage, place in neutral, put side stand down, place on center stand and then turn engine off. But, the rear wheel tends to rotate when placed on center stand in neutral and that may be part or all of the problem as some reports here claim that the electronics do not completely disengage if the wheel is turning. I am not sure. I have not noticed any problems if I leave the FOB on, but remove the FOB from the area of the cycle -- then again my habit is to turn the FOB off, mostly. I also am now in habit of double "off" turning of the knob to get the steering lock signal. Another problem may be that the dealerships are not initializing the batteries at set-up time; although I would think that YUSA would have factory initialized since it is a no maintenance battery design.
prs