I had to get some for the KTM400 for sure. I snatched these up off of Ebay for $20 shipped! Great little bags with adjustable straps. I just threw them on this morning to show the possible mounting locations. They are designed to go across the top of your fuel tank which is why they have a hole in the middle of the saddle. I thought they were made for the rear seat area when I first borrowed my friends bike but I couldn't really find anything like it online... then I removed them from the Husky and realized there was a hole for the fuel tank cap! Sneaky!
And on the back: