They can be removed, they are held on with double sided tape. Some members have used dental floss to carefully saw through the tape. Others use a very thin bladed screwdriver to lift the edge of the badge and work their way around the edges. You will need to protect the tank with adequate padding so as not to damage the paint work. Go gently, if too much force is applied you can dent the tank. Squirting WD40 behind the badge and letting it soak will help soften the glue while you are carefully lifting up the edges. Reapply WD40 as you go.
Regards Martin.