In my opinion, they don't so much get the wind off your legs but help with buffeting of the helmet. At least on the Valkyrie that has been my experience.
Duly noted... I'll have to try to figure something else out since highway bars are pretty much out of the question with the way the engine hangs in there (stressed member).
If it was me, for a long trip, I'd remove that bitty headlight nacelle and replace it with a larger fork mounted faring-like shield. And maybe add the lowers too.
That is done already... I have a bar-mount shield that can be add/removed with 2 measly bolts. It's not large (about 14x18 inches), but it keeps the wind off my chest and is easily adjusted to get rid of buffeting. It actually slides over the headlight JUST under the nacelle/micro-fairing... almost like it was MADE for doing that.
That does not look like fun.
I hear ya... I would much rather a bike better made for touring. Unfortunately, for the past 2 years, the dismal oil-field has had my paycheck at a 40% cut. So my choices at the moment are to keep the touring rig and not have money to make the trip, or get rid of the touring rig (and it's monthly note) and take the trip on a bike that's already paid off.
You know anyone who would like a 2014 Goldwing (base model) in black?????