1- remove the 12mm bolt
2- use a socket extension to hold the tank up while you unplug connectors -- 1 for the speedometer and 1 for the fuel pump. disconnect the fuel line by pinching the blue plastic connector and pull apart-- some gas will come out -- not much-- have a rag ready.
3- slide tank towards the back and up and off.
4- remove the screw on the plastic speedometer cover and slide off.
5- remove the 4 screws that hold the plastic speedometer cover on to the gauge.
There is only one screw that holds it down, that is the one under the seat. There are rubbers bumpers under the tank that may be helping hold it down. Just left it carefully. It will come off. Try pushing it forward as you lift it.