That thing happened to my 2nd month into my new 2007 N-250! I was working on putting the alarm system in and laid aside the lockwashers. Next day I come back from work wonderin how these scratches got on my bike tank. Next day same dam thing. Found 1 more small scratch.. I was getting ticked! Then looking at my tank bag in the house.. found one of those damned lockwashers stickin to one of the side magnets of the Manta Bag.. So thats where the extra washer vanished, so what idiot would not pay attention to where they placed the bag on the ground... that would me!