Thanks for your reply. My bags came with 2 straps and 2 bungie cords. I tried to place straps under the seat, but then the seat don´t get locked correctly. Also I´m little worried if I put those to my bike, my tail fairings could get scratches. Bungie cords are all right and I can put those under the tail. And other problem is that if I put the bags on to my bike, theres no leg room for a passenger, but I guess I´m using bags only when driving alone or with other bikers.