I've got the same bag, and had the same issues with straps hitting the bodywork. Tried some heavy clear soft plastic to keep it from rubbing - flapped in the wind and messed up the paint worse!
I found that removing the rear seat and attaching the bag directly to the seat worked better. I adjusted the bungies so the hooks could all be hooked together snugly under the rear seat pan and then re-attached the seat.
Worked a lot better for me.
Jay
I found that removing the rear seat and attaching the bag directly to the seat worked better. I adjusted the bungies so the hooks could all be hooked together snugly under the rear seat pan and then re-attached the seat.
Worked a lot better for me.
Jay