I have heard nothing but bad things about NOS on Buells but a wet system would be the best bet. I have some friends at work the build tuners and run NOS and I asked them that question awhile back and their answer was "not a good Idea but shoot it wet if you want the motor to last". But I have found a cool place to mount the bottle. On the swingarm where the belt guard bolts up you could fab a bracket to mount to the two existing holes. It would be pointing down and back like you need it.