I like mine. They reduce the wind fatigue on the legs and keep most of the cool air off on the morning commute.
The vents allow air flow if needed. Mine were included with the purchase
I previously used the vinyl version on the crash bar on the '84. Results are about the same. Nice for winter, removed for summer.
i leave mine on all year round. i love them. makes the bike look more beefy from the front, legs dont get soaked in the rain, keeps the heat on your legs in the cold, and the bugs off your pants in the summer.
The only thing I don't like, is that the gap between the upper fairing and the lowers allows the cold air to hit me direct on my arthritic knees. Everything else stays fairly protected.
Made a huge difference on mine, great for that draft that comes up from the bottom, great in the rain, and really not much hotter sitting stillwith them on either. I go to work at 4:30 am and wouldn't trade them for anything when I hit those creek bottom's BRRRR!!!!