I run a Cortech Dryver lock ring tank bag. I've had it on my old BMW and now my FJR. It has plenty of room (Hat, Keys, Wallet, 2 Bottles of water, pair of gloves, advil, etc). I don't have a very good pic of the bag, but it doesn't touch the paint. Only gripe is after 4/5 years, it is starting to show some fading. Mine is size small.
http://www.cortech.net/inc/sdetail/dryver_tank_bag/175/568