If you've got an '04 or newer bus with the raised chrome 'S' emblem on the tank, it will come right off with a hair dryer.
Don't use a heat gun, it's too easy to blister paint or scorch plastic.
For the tail stickers and kanji, same deal - hair dryer. Neither are under clear coat.
Use some rubbing alcohol to remove the residue, then wax the areas. You'll be good to go.