I take it you mean the fuel door?
Remove the V shaped panel that sits just in front of the saddle. This will expose the first screw. Once it is removed I believe the door and hinge will come off. If not you're half way there and should be able to figure it out.
13 Vision Tour - PCV, Top Filter, Stage 1 Pipes, TW @ +4, Metz 888s
08 Vision Street Premium - VFC, Top Filter, Stage 1 Level 2 Pipes, E4s
Past Vic - 07 KP Tour - Stage 1, S&S Intake