If your Burgman 400 that came with only one magnetic key. Any one that is down to only one working magnetic key would save a lot of trouble with this information.
You can duplicate a key for a Burgman 400 or 650. For under $15 you can Buy magnetic key blanks here and make a magnetic key for a spare. You get a key and three magnets that need to be inserted and sealed. place the magnets in all three. you’re able to get the shutter “unlock” to work on all of them.
The key also needs to be cut to match your key. take the blanks to a competent locksmith to cut them to the original. the new keys will work properly in the ignition, gas cap, and dashboard locks.
If you had the three magnets you could place a magnet on one of the magnets in the key (without disassembling it) the position of the magnet as it is attracted tells me how the magnet goes into that hole. So if you hold the good key and attach the three magnets, put them one at a time into the right holes on the new key blank. You now have a new key to match my old key.
Note:
Remember opposite poles attract.
Magnets has to be in correct alignment for key to open or close the window: place a magnet on one of the magnets in the key (without disassembling it), the position of the magnet as it is attracted tells you how the magnet goes into that hole.
So if you hold the good key and attach the three magnets, put them one at a time into the right holes on the new key blank. You now have a new key to match my old key.