Nope, there isn't. Unless in my case it's too small.
Can you picture me on a Sportster? I can ride them, just uncomfortable for me, I feel like my knees are up under my chin, lol.
I have actually been looking at a couple though, I don't know if I could orient things differently or not to make it more comfy to ride. I found one in Tecumseh for 2700, looks like it's in decent shape.