: windshield mod to reduce helmet noise - Wow!
Docteric 09-15-2008, 10:06 PM I couldn't find the previous thread quickly so I'm starting a new one.
Someone wrote of putting some washers under the two bottom bolts holding the Givi windscreen on to reduce the wind. I tried it today and boy does it work. I put three washers between the windsreen and the bracket on the bottom bolts (neoprene one against the windshield and two nylon ones behind it against the bracket) and the wind noise and buffeting is remarkably less. For the first time I'm able to ride on the highway without ear plugs. And my head is not bounced around like before.
Whoever you are - you're a genius and an ear saver. :yeahsmile: :clap:
layfju 09-16-2008, 12:43 AM can you post a picture of the washers and the screen? I want to see what they look like and get a better idea of how it is set up.
De-Silva 09-16-2008, 06:30 AM Hey Doc,
Pictures / part no's and sequence of these washers would be awesome....I'm 6'2" and am getting killed by noise on the highway! :( Also, what position is your Givi in? Bottom / middle / /top?
Appreciate your help!
boogdaddy 09-16-2008, 06:54 AM Hey Doc,
Pictures / part no's and sequence of these washers would be awesome....I'm 6'2" and am getting killed by noise on the highway! :( Also, what position is your Givi in? Bottom / middle / /top?
Appreciate your help!
I've not had the Givi windscreen at any point yet. I did, however, switch to the Vario windscreen with the adjustable 3" wing at the top. I'm 6'-4"+ and it made a huge difference for me. I rode about 350 miles this weekend nearly all at 70mph-85mph, and I was very comfortable. Having said that, I do believe that riding style, riding position on the bike, and tolerance for wind noise and buffeting all vary from rider to rider. In other words, two riders who are both 6'-2" may not have the same reaction given similar setups to each other.
If you haven't tried the Vario, you might give it a shot if the washer addition doesn't work out. The Vario seems to work for some, and for some it's just so-so. I have good luck with mine.
De-Silva 09-16-2008, 07:32 AM Jeff,
Thanks a bunch! If this doesn't work out, then I will certainly try the Vario...on the longer rides, I specially begin to feel it towards the end when I'm a bit tired as well....not a good thing!
MackDaddy 09-16-2008, 07:38 AM I'm with BoogDaddy, the Vario is far better for me hands down over my Givi. I'm not ready to give up on the Givi just yet though, as I feel for me in Ohio with COLD weather approaching it will come in handy (some how.)
:D
golfmuch 09-16-2008, 07:48 AM The best mod I ever did was install the stock windshield upside down. I run the calsi. in the winter.
oxman 09-16-2008, 09:05 AM I run the Givi and im very happy with it but im only 5,7...... heres what i read to make my decision to buy the Givi , but i must say that the vario is better looking .
http://http://www.webbikeworld.com/motorcycles/kawasaki-versys/windscreen/
oxman 09-16-2008, 09:07 AM http://www.webbikeworld.com/motorcycles/kawasaki-versys/windscreen/
this link might work better....
stryker75 09-18-2008, 09:20 PM Any updates on the type of washers used to create the tilt? What length of screw did you need to use after that to get it on? Pics? where you bought the washers and screws?
Red Herring 09-18-2008, 10:23 PM Were the washers those thick plastic plumbing washers used in the top of tap cartridges? Or flat washers?
atgatt 09-19-2008, 06:07 AM On my previous bike I put the Winglet at the top of my screen:
http://www.saeng.com/2018.htm
It reduced noise and felt wind, but...I could adjust it as I rode because the stems that held it flexed so I would "fine tune" it with my left hand. What position worked one day going the same way as always didn't work on other days because it mattered which way the wind was blowing and how hard. It was ugly too.
What I may try on my Givi is to change how it attaches by making the two upper attachment points, pivot points, and the lower attachment points having one secured front/back motion within a certain amount of degrees that can lock in place easily anywhere within those degrees.
First I'll try washers to give me an idea what differences I see.
stryker75 09-19-2008, 08:53 AM On my previous bike I put the Winglet at the top of my screen:
http://www.saeng.com/2018.htm
It reduced noise and felt wind, but...I could adjust it as I rode because the stems that held it flexed so I would "fine tune" it with my left hand. What position worked one day going the same way as always didn't work on other days because it mattered which way the wind was blowing and how hard. It was ugly too.
What I may try on my Givi is to change how it attaches by making the two upper attachment points, pivot points, and the lower attachment points having one secured front/back motion within a certain amount of degrees that can lock in place easily anywhere within those degrees.
First I'll try washers to give me an idea what differences I see.
What kind of washers do you plan on using? Also, do you think that edging that the company sells is worth a try?
atgatt 09-19-2008, 09:13 AM What kind of washers do you plan on using? Also, do you think that edging that the company sells is worth a try?
Just regular washers to experiment with. I just won't crank them tight.
No, I tried the edging once just by itself and didn't see much change. Save your money on that.
Gustavo 09-20-2008, 12:45 AM It was a Powerbronze screen, but it should have the same effect on Givi's...
http://www.buhacoff.com/mc/UVG2008/IMG_6802.jpg
I used two nylon washers to create a spacer about 1 cm tall and tilt the windscreen back a little. You can experiment with different tilt angles. Depending on which screen you have and how tall you are, different angles may work better for you.
Gustavo
Docteric 09-20-2008, 09:11 PM Sorry for taking so long to get back to you guys. :sorry: I don't have any photos of the washers etc. As I wrote in the first post, I used a neoprene washer against the windshield, then two nylon washers, then the rubber gasket that comes with the brackets. The washers are standard #10 from Home Depot. They're just under .25 inch thick all together. I used the stock bolts and nuts which made it tough to get the nut threaded at first. I'll probably eventually get longer bolts. I didn't crank down the bolts very tight and they did seem to be a bit loose yesterday. I tightened them down a bit again - we'll see how well they stay tight. It might have just been some settling.
'hope this helps.
Dorian 09-21-2008, 05:13 AM I purchased the Vario wind screen, and despite the adjustability, I was still having lots of wind noise and buffeting at highway speeds to the point that it sounded like a tornado in my head. To remedy this, I removed the adjustable wing of the Vario and replaced it with the stock wind screen the bike came with. No my ride is very quiet. I can even hear the engine at 75 mph, and my face shield doesn't get covered in condensation if I ride in the fog. Hopefully the picture come through.
atgatt 09-21-2008, 06:19 AM I tried this yesterday by putting in longer screws in the two bottom holes, loosening the top screws and then sliding plastic "door jam shims" in between the bottom and top screws so I could adjust for a lot or little tilt quickly.
There was more wind blast feel because the screen was lower. But considering all there is to consider, what works or does not work for one person with a screen, is on the most part an individual bases.
dallasdon 09-21-2008, 07:59 AM I made some brackets that would extend the height of the Versys windshield bracket by about 4" and mounted the Give windshield on the highest points. It works quiet well as the air goes over the top of my helmet drastically reducing wind noise and buffeting.
stryker75 09-22-2008, 07:19 AM It was a Powerbronze screen, but it should have the same effect on Givi's...
http://www.buhacoff.com/mc/UVG2008/IMG_6802.jpg
I used two nylon washers to create a spacer about 1 cm tall and tilt the windscreen back a little. You can experiment with different tilt angles. Depending on which screen you have and how tall you are, different angles may work better for you.
Gustavo
Is that the MRA windscreen? I saw something like that in the twisted throttle magazine. How does is work?
edalfa 09-22-2008, 07:41 AM I'm wondering what the root cause of helmet buffeting is. Is it that the air flow is not blocked enough? (Dallasdon's extensions seem to support that.) Or is it the angle that the air is deflected that allows it to swirl behind the windscreen? (Inserting washers at the base of the windshield supports that theory.) I am 6'3" and get smacked in the face with my Givi in the top hole so I really would like to fix things. I've been looking at http://www.saeng.com/4000.htm Has anyone used this stuff?
Ed
alphabetsoup2003 09-22-2008, 12:16 PM Is that the MRA windscreen? I saw something like that in the twisted throttle magazine. How does is work?
what kind of tank bag do you have?
Here it is- the proper (patented) solution- not the washers!
Adjustable in any position you like.
Gustavo 12-08-2008, 04:30 PM Is that the MRA windscreen? I saw something like that in the twisted throttle magazine. How does is work?
It's a Powerbronze screen. It didn't work at the stock angle, but after changing the angle, it works rather well. You can see the original thread about that here (http://www.versys.co.uk/index.php?option=com_smf&Itemid=45&topic=1845.0).
Gustavo
Gustavo 12-08-2008, 04:31 PM what kind of tank bag do you have?
Assuming you were referring to the bike in the picture - that's a Wolfman Explorer Lite.
Gustavo
dallasdon 12-08-2008, 05:41 PM Here it is- the proper (patented) solution- not the washers!
Adjustable in any position you like.
Ok, I'll bite. Where can you get them and how much are theY?
Darth Lefty 12-08-2008, 09:28 PM Ok, I'll bite. Where can you get them and how much are theY?
And why is it patentable?
carter 12-08-2008, 10:34 PM Dallasdon, where did you find your acerbis handguards...I have basically the same setup as you w/ the Givi screen and the extenders in the same place and I think I read on another post that you didn't have any trouble w/ the acerbis guards touching the wind screen after you fiddled w/ it some..
Thanks,
bryan
Gustavo 12-08-2008, 11:01 PM And why is it patentable?
Must be the first ever four-bar linkage mechanism... ;)
Gustavo
gti20vturbo 12-09-2008, 11:43 AM I'm wondering what the root cause of helmet buffeting is. Is it that the air flow is not blocked enough?
From all the testing I have done with yarn attached to my various designs buffeting is caused by the failure of the windscreen to direct the flow from the middle of the screen to the outer edges when it flows over the top.
This is why my screens have higher corners then the actual top middle of the screen. Also these "taller corners" have a slight flip to them. What this does is create higher pressure in front of the screen on the outer top edges (which creates lower pressure behind the screen at the top edges). As the air flows up the screen and spills over the top the air in the middle is allowed to spill over first (its lower than the top corners) and flow outward into the low pressure areas behind the top corners. Yes you still get a little "wind noise" but your head is not being tossed around and it doesn’t feel like something is pounding the top of your helmet with a rubber mallet.
Sheilds with tall centers or peaks that are not tall enough to direct the flow over your head (you almost have to look through them) will have the worst buffeting because it concentrating all the air that flows over the top to the center right where you head is.
Ok, I'll bite. Where can you get them and how much are theY?
The price for adjustable holder made from laser cut INOX/CNC machined aluminium alloy is 48.-EUR:thumb: (+ additional 8,30 EUR postage Economy or 12,85 EUR Priority).
More informations at algard@siol.com:welcome:
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