As a priority I urge all F650 , GS & Dakar owners to carry out an inspection of the wiring loom that runs along the top frame rail for chafing and corrosion as per the picture, you will need to remove the air tube snorkel to locate this little horror! Symptoms were battery going flat in hours, no headlight when the ignition is switched on, the bike will start & run, but as shown, this is a dead short from the + terminal on the battery and goes to negative in contact with the frame. Easy enough to remedy, just remake the connection and cover the loom with some high quality plastic blue water pipe, cut along the pipe to cover the exposed loom and also place some same pipe on the frame and cable tie up.