After-market wind deflectors to add to screen?

[UK250]

Folks,

Just fitted the higher Givi screen to my XL700V Transalp only to wind that whilst the general wind resistance is much improved, I get thumped round the head by wind buffeting at anything over 70kph

Have done some research and have come up with "aero-trim" (www.aerotrim.co.za - has screen shots of what I mean) which is an after market wind deflector which can be added to existing screens. Only problem is they are in South Africa and don't appear to have a distributor over here

Any clues of a supplier over here of the same or a similar product ?

Cheers,
Rob
(with a bouncy head !)

[TOTO]

seen it on a few cruisers actually. You may wanna ask in a shop for Harleys or something. let us know how you go with it.

[awayatc]

New plymouth Motorcycle centre had it on one of their new Suzukis in the showroom.....
So I presume they sell the things.....

[vifferman]

After riding one-o-them-thar Ad-Venture Sikkles, with a high screen (Bimmer GS1200 or somesuch), I'd say the problem is probably that the screen is too high and upright. Yes, it had a big zone a-hind it where the wind was kept off, but the turbulence (and noise) was the worst I've ever experienced on a bike!
You're trying to stuff a reasonably unaerodynamic shape through the air, and the air's collapsing in behind it, causing turbulence and buffeting.
Have you tried going lower?
Alternatively, is there somewhere lower down in the Givi screen that bleeds some air through to reduce the low-pressure zone behind the screen?

[Devil]

Go look up a Laminar Lip.

[98tls]

Fwiw a few years back i read an interesting article about helmet buffeting and according to them that know it has more to do with the shape of your helmet,more to the point the rear of your helmet.

[Winston001]

Go look up a Laminar Lip.

Agreed - in the USA http://www.laminarlip.com/

After riding one-o-them-thar Ad-Venture Sikkles, with a high screen (Bimmer GS1200 or somesuch), I'd say the problem is probably that the screen is too high and upright. Yes, it had a big zone a-hind it where the wind was kept off, but the turbulence (and noise) was the worst I've ever experienced on a bike!
You're trying to stuff a reasonably unaerodynamic shape through the air, and the air's collapsing in behind it, causing turbulence and buffeting.
Have you tried going lower?
Alternatively, is there somewhere lower down in the Givi screen that bleeds some air through to reduce the low-pressure zone behind the screen?

Wot he said.

I've played around a lot with the huge fairing on my BMW RT because there was a lot of helmet buffeting. Height didn't help much. Finally through trial and error I discovered that the rake of the screen made the most difference.

Tip the screen back towards yourself and it will push the air over you so that it roils behind your helmet. Also try bleeding some air under the screen to reduce the air pressure imbalance. Just experiment until you find the right combination.

One method is to tape cardboard or light perspex onto your screen at different heights and angles. Lowering the screen might just be the answer too.

[no-coast-punk]

You could always get one of these.

www.rocketshields.com