Yeap....that's me:downtown:

The Greek version of the Turbulance stopper can be found at: http://www.moto.gr/forums/showthread...&pagenumber=23 (On pages 23 and 24)

First impressions are: Less wind from the down side of the bike and
less noise from the engine

Looking good. :045:

Let me know what you think after doing 70mph+ with it.

I couldnt decide if the front end felt lighter or not. I don't think it is having an effect, probably just psychological.

I was going to modify mine with some 'flaps' that allow some air flow through and down, I put it in the oven to soften it a little to be able to bend it.......think I left it a little too long as it started to bubble !! ooopps!!.

Let me know how it goes at higher speed.


Nick.

can someone put some pressure on Yamaha as we're all complaining about this annoying turbulence and a large company like this could really help customers by sorting it............if youre listening Mr Yam!!!!! ?????

I have had problems since day one, it did give me headaches initially as my head is occalating (can't spell) and even with a shuberth and ear plugs its noisy but as someone said some days it ain't so bad which is odd.
BMW GS's suffer with this aswell and i think it came down to the wind coming up through the forks. A guy made some adjusters for the screen giving it infinite variations which made things better, another guy cut some aerofoil slots in the screen which apparently reduced it.
I am still debating getting another taller screen, i have the TT extender but am not convinced it is doing much.

Molgan,

would you be so kind to send the autocad file to my mailadres? Helen.erik@hotmail.com I'd like to try the " turbulance stopper" to reduce the turbulance probs I'm having

Kind regards

I'll be listening in here with interest. My test ride on the Tenere was really hampered by the turbulence I felt at 60-70, which is the bracket in which I do most of my on-road riding. It felt pretty unpleasant while it was happening and I have a bit of a headache now as a result. Not something I would look forward to on a day-to-day basis.

The effect for me was a rapid side-to-side wobble of just a cm or two, so I was wondering if it was the air coming around the sides of the screen. THe air from the right side pushing my head left out of the flow, into the opposite stream and then the air from the left pushing it back, ad nauseam. Literally. Years ago on an old GPZ500 I discovered that if I removed the soft rubbery edging fixed to the edge of the screen, it changed whether the airflow hit me in the face or the chest. I had thought it was just there to soften the blow when you bashed into it, but realised quickly that it wasn't when I took it away. Perhaps adding a small edging strip around the Tenere screen might do something useful... It doesn't sound like much but it might be enough. Just a thought!

Regarding someone's suggestion of wind tunnel testing. It would be possible to submit this sort of thing as an undergraduate final year project suggestion. Anyone who did would probably have to offer the use of their bike for a few days of testing, but its basically research done for free. I did my final year project for a company that made bomb disposal robots and wanted to know whether their controller could be improved.

What a top idea!

Not sure I'd be too keen on giving my bike to a load of undergraduates though.

This is the sort of problem I had and found it was the flow of air over the top of the screen hitting the underside of my helmet, a screen extender or higher screen should fix this.

The 'drumming' noise you mention in your other post is not air turbulance I dont think. After talking to Scott (Scottnet) who suggested pulling the clutch when on the motorway to see if whatever problem you have goes away. I get a bit of drumming noise, not much since I stiffened the peak of my Tour X and cut away some of the foam where my ear is inside the helmet. However, pulling the clutch at motorway speeds stops any drumming noise I have, so it's the vibe of the engine more than the turbulance of the screen that you experianced.



Nick.

I think the drumming noise was someone else - it wasn't me guv'. Honest.

As for the top of the screen, when I put my hand there to artificially add a few inches to the top and there didn't seem to be any noticeable difference in the buffetting effect. Though having my arm there at all probably messed up the normal aerodynamics anyway. I did notice the airflow was much weaker at the peak of the screen than I was expecting though.

I did wonder what all the drivers going the other way thought of the motorcyclist with the wobbly head whizzing along waving his arm about in front of him...