The factory service manual tells us to remove the front fork air baffle which attaches to the triple tree with either 2 or 3 screws during hot weather. It further advises that removal will allow air which is trapped under the tank area to be evacuated more efficiently, thus allowing the rider to be a little more comfortable.
It works. I have hung streamers from the crash bars and the handle bars with the airdam on and off and there is a noticable difference in how the dynamics change. In the winter time (airdam on) you want that trapped air to come wafting up from the tank-rocker box area. It might only be 4-5 degrees warmer but when it is 30 outside, any help is appreciated.
I did notice that on the 2010 RG Custom, which has a little different sharknose on it, that the factory no longer includes it as stock equipment. Not sure why. Maybe cost savings, or not. Either way, that is beyond my pay grade.