I'm 196cm and ride the same model of bike
. Like you, I didn't feel that the standard screen was doing a great job in any of the three available positions - at least, not past 60mph.
I've totally sorted the issue now, but as I discovered, the screen is only
half of the problem
. Long story made extremely short; the Givi Airflow screen (AF3101
) set in mid position (that's important, as this allows it to create the maximum air compression between it two layers), does a superb job of pushing air right over the top of my (crash
) helmet and leaves me riding in what feels like a 'vacuum' (compared to the wind tunnel that I used to be subjected to).
However, there was still a lot of 'rough' air coming at the sides of my head, after making this upgrade. It was coming from the stock (barn door) mirrors. Now, I
love those big old mirrors (from the point of view of safety) and swore that I would never change them, but when I did eventually try a pair of (fake) Aprillia Tuono mirrors on there, the remaining 'buffeting' winds went away and I was left with a ride that was as smooth as anyone could reasonably expect on a motorbike
. Also, after a few minutes on the road, I soon realised that the smaller mirrors gave me almost as good a view of what was happening behind me and I didn't really need to see all the way from the Tarmac by my rear wheel to the stratosphere
(as with the standard 'all inclusive' mirrors).
So, I can predict with a fair amount of confidence that you would gain a great improvement from fitting the following two components (although there are bound to be other options, too) ...
http://www.givi.co.uk/screens-and-spoilers/AIRFLOW/Airflowhttp://www.ebay.co.uk/itm/Motorcycle-Rear-View-Mirror-10mm-For-BMW-F650GS-F800GS-F800R/131629594039?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140122125356%26meid%3Dbee6e4b76a454ffe8ebb959f4fefbaa0%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D201177981491I also have mirror extenders on my bike, although I don't know how much difference they make to the turbulence issue
.
Good luck with sorting it out
!