Glad I'm not mechanically minded
Seriously it is an easy job to change the air filter, loosen the bolt/allen screw at the front of the fuel tank just behind steering yoke, remover seat, undo the bolt that passes through the brackets at the rear of the tank, get a suitable size piece of wood about 16 inches long by about 3 inches deep, raise the tank from the back and slide the piece of wood under the tank about 1/3rd the way along from the rear between the bottom of tank and the frame, the screw at the front that you loosened will keep the tank in place and stop it falling off the frame. Under the rear of the tank is a fuel tap, shut the tap off and disconnect the the fuel line by pinching the two lugs on the clip together with a pair of pointed nosed pliers, a small amount of fuel will come out of the pipe but nothing to worry about, you can slip a piece of rag under the fuel tap if you wish to catch the leakage. You will find a electrical green connector and plug that that connects to the fuel gauge disconnect this by just unplugging it. you can now remove the screw from the front of the tank completely and lift the tank from the bike. put it in a secure place where its not going fall or get damaged. Change the filter element and put bike back together in reverse procedure. Not forgetting to connect the fuel pipe and fuel gauge electrical connector, and don't forget to switch the fuel tap to the on position.
45 Minutes if you take your time and have a wipe around under the tank with a rag dampened with WD 40.
While you there check the coolant level in the radiator, cap on the right hand side front of bike under the fuel tank.
Jobs-a-Gooden.