A heat shrink gun works wonders as they usually have a beveled nozzle so you can concentrate the heat in a smaller area. A hair dryer works too, but takes a little longer to heat the sticker. Be careful not to overheat and melt any of the plastic.
Some Goo Gone will help clean up the tape residue if you didn't get the sticker warmed up enough. And peel slowly.
And like CDR mentioned, DONT mess with the decals on the tank.
A forum community dedicated to all Kawasaki motorcycles including the ZX-6R, KLR 650, Ninja 250, Ninja 250R, and Vulcan. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!