Steveva,
It looks like it can be done.
The bag is barely full. My tools are in the lower black sections and I have my jacket shoved in the top to fill it out a bit. I tried to get it basically in place and strap it down enough that you could see where the contact points are. The exhuast does not touch. The way I did it, there is some blockage of the hand rails, but you could probably work around that.
I'd think a better/bigger luggage rack would be very helpful. Stock appears to work.
I need to finish packing. I'm meeting up with friends at 8:30, which is early for me. I'll be back in a few days. If you have questions, let me know.
Ivan