Wind noise from the CBR250Rs windscreen is an aspect of the performance that serves to force my head lower and fuel economy numbers higher. There is a bizzar tearing noise in the ultra thin boundry layer at the top of the windscreen. If you ride with any part of your helmet in this layer, it is very loud, even through my Schuberth C3 which is supposed to be one of the quietest helmets made. It sounds like a stack of ten sheets of cloth being shredded at once in a strong man competition. And never ending. This encourages me to ride with my head as low as possible, alternating between peeking out through the screen or just over the top as my strength and pain threshold permit. The Aerodynamics are actually very good if you are strong and commited and compact enough to get your head below the top of the screen. Now that I know the unreal fuel economy that I can expect, ducking below the noise makes me feel like the tearing sound is setting up a warp field to punch a hole in the time/ space continuum and all I have to do is find a way to get inside. It is not easy though and should be done with great caution by beginners as you must now shift your chest and butt off of either side of the bike to set up the entry to tight, high speed bends. Once under the noise layer, the wind is very quiet. It's as if the crazy noise was never there at all. I can definitely say that my engine does not make any ticking noise anywhere. The strange gaps in the bodywork that the stylists drew in to make the bike look cool surprisingly don't make much noise either. In city traffic I ride a little more forward on the tank where the windscreen is shaped well to get the wind blast just over my shoulders but with the helmet in clean air.
