Great info, and well worth noting, thanks John. I have a tendency to run round most of the fasteners every time I ride, very quickly, just a quick twizzle on all the most obvious ones. While not a foolproof method, because a bolt without a nut on it may seem tight if under tension at an angle from two parts ( eg fender to battery carrier)  its amazing how often you find a loose one, and its a check that can be done casually in a couple of minutes flat. Tank mounting screws a particularly common fastener  to lose, as they don't want to be overtightened because of the risk of damaging the tank , ( enough to crush the lock washer should be about right). I recommend a touch of blue loctite here. ( not red ).