[You must be registered and logged in to see this image.]
My G1100 came with the factory small screen but I wanted a bit more wind protection so bought a Dart Marlin screen. To be honest there was not a great deal of improvement and when I bought a new Shark helmet the screen air flow seemed to try to lift the helmet slightly at 80mph.
One option was to put the factory screen back on but instead I went for a screen deflector, at under £20 it wasn't going to break the bank if it was crap.[You must be registered and logged in to see this link.]
The thing was surprisingly well made, a doddle to fit and didn't look at all bad once on. It is adjustable for height and angle of deflection and actually does make a difference once the right position is found. There is less wind noise and no helmet lifting. I tested it up to 125mph and there were no issues.
For my height(6'2") and with a Dart Marlin screen it was worth the £20 and can be easily removed if required. It also allows longer motorway trips at high speeds more bearable, so all in all a good result.[You must be registered and logged in to see this link.]