Just finished reading a post by a well known Phatmoto owner reporting on a Brake Disc screw that popped out and grounded him for a while. His advice is to check of your bike before each ride for loose nuts and bolts, something which I strongly endorse after my most recent experience. With this advice in mind I decided to check my bike over before a ride, The engine was running at the time at a fast idle and it was easy to spot a lock washer for the rear brake disc bouncing around in the sun light signifying
that the attaching screws were backing out.