I use a heat gun each time I change the graphics on my bikes. I then use WD-40 to remove the glue residue then wipe that off with some contact cleaner on a shop towel. If you need to scrape them off, use a plastic wedge, it won't damage the plastic under the sticker.
2006 CRF450X(Baja ready baby!!)
Team Hammernutrition/T&S Motorsports