You need an allen key to remove the drain plug (can't remember what size, sorry) and a tool of some sort to remove the oil filter. Do a search on "oil filter tool" in the 1200 forum and you should see what people have come up with. You'll also need a torque wrench to reinstall the drain plug if you want to do things properly.
If you've changed the oil on other bikes there's nothing special about this one really, apart from the recessed filter which can't be removed by hand.