Yamaha FJR1300
Tankbag attachment instructions

This procedure is fairly simple.
One strap attaches under the seat at the back of the gas tank.
The two front straps attach to the bracket that holds the fairing panel on

You may not have to remove the panel all the way this photo is for reference only. Loop webbing around the bracket as shown replace allen bolt. Repeat on the other side.
The back straps loops around the seat bracket behind the gas tank as shown.