Windshield physics question, anyone?? - Kawasaki Versys Forum
 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old 03-18-2010, 01:03 PM Thread Starter
Member
 
Join Date: Apr 2009
Posts: 9
Mentioned: 0 Post(s)
Windshield physics question, anyone??

Ok gang, I have a stock windshield set at the highest setting. My V is the first bike Ive ever had with a windshield. Last bike was a bonneville. So I have no experience in this area. I am 6'2" and currently when riding the V I have clean air pretty much from just below my chin and down. My entire helment is outside of the quiet area but is in clean air. If there is a "buffeting" area of dirty air it is right at my neck so it doesn't move my helmet around at all.

So, here is my question. I have thought about a taller touring screen and followed many threads on the topic. Well, my helemet is about 11-12" high or so, so does that mean my new screen would need to be at least 11-12" taller than the old one to get the dirty air over my head? I would like more wind protection, but I dont want to move the turbelence up somewhere in the middle of my face. So is the height of the new screen the most important factor, or can the actual shape/ curve of the new screen actually move turbulence higher than just the height of the wind shield?

I know all that may be a little hard to follow, but I want to get a screen that will enlarge the clean air pocket but not bounce my head around with turbulence. Any advice here would be really appreciated.

Ryan
peoriakid is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 03-18-2010, 01:46 PM
Member
 
weljo2001's Avatar
 
Join Date: Jan 2010
Location: Norwalk CA
Posts: 15,506
Mentioned: 6 Post(s)
Garage
I'm also 6'2" I got a lot of input from the guys on this site that was very helpful. I went with the Givi Windshield mounted at the top position. It made a huge differance can actually ride around with my modular helmet in the up position instead of always being closed because of the wind

2009 Blue Versys.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Sold
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My Farkles...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My Video Channel
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My Photos...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


I'm not a Gynecologist. "But I'll Take A Look"

Everyone has a plan 'till they get punched in the mouth...
Mike Tyson

"Ya'll can go to hell, I'm goin' to Texas!"...Davey Crockett
weljo2001 is offline  
post #3 of 15 (permalink) Old 03-18-2010, 03:25 PM
Member
 
Bones's Avatar
 
Join Date: Aug 2008
Location: western Massachusetts
Posts: 1,788
Mentioned: 0 Post(s)
I have a Madstad adjustable windshield mount and the smoothest air flow for me comes with the shield up about half way and tilted back about 10% from the most upright position. If I go higher or more upright, the buffeting is bothersome. Takeaway is: adjust your shield until you find the best position for you.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


[SIZE="1"]Ride. Good.


2003 ST1300ABS
2008 Versys
IBA 59868
Bones is offline  
 
post #4 of 15 (permalink) Old 03-18-2010, 07:39 PM
Member
 
stlee29's Avatar
 
Join Date: Dec 2008
Location: Bukit Mertajam,Penang,Malaysia
Posts: 3,187
Mentioned: 0 Post(s)
Did a wind tunnel effect test when comparing the Puig and Givi screen.
Clamped a few ribbons on the screen edges to see how the air flow went.

Then tested the the Givi screen on all the other setting and settled with the highest setting. I'm 5'11.


My V Blog:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Ride safe,
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
stlee29 is offline  
post #5 of 15 (permalink) Old 03-20-2010, 01:08 AM
Member
 
Bicyclebob's Avatar
 
Join Date: Jun 2008
Location: Bellingham, WA
Posts: 624
Mentioned: 0 Post(s)
Talking

Bicyclebob wind tunnel test:

1) Find bug swarm.
2) Blast through at 65 mph.
3) Note splatter pattern.
4) Smile at kids.
5) Brush teeth.
6) Lean stock screen back 1/4 inch by putting spacer under bottom bracket mount and discover that it works perfect for me. 5'11"......Homer Simpson body double.

Japanese scientists have created a camera with such a fast shutter speed they now can photograph a woman with her mouth shut.

Last edited by Bicyclebob; 03-20-2010 at 01:11 AM. Reason: Spel chek broke
Bicyclebob is offline  
post #6 of 15 (permalink) Old 03-21-2010, 10:19 PM
Member
 
tomla's Avatar
 
Join Date: Nov 2008
Location: oakland
Posts: 577
Mentioned: 0 Post(s)
I started with a givi 405, tried all the positions, with low as the cleanest. then clamped a piece of sheetmetal on the screen in the highest position, playing around with the heights. didn't want to look thru the screen on this bike, so settled on flattening the top of the givi screen by sawing off the crown and adding an mra vario wing, vt4, from twistedthrottle.com. it's sweet now, but not easy or cheap. I still plan to just run the stock screen upside down in the warm months.
tomla is offline  
post #7 of 15 (permalink) Old 03-23-2010, 06:51 AM
Member
 
Join Date: Mar 2010
Location: San Pedro de Alcantara
Posts: 539
Mentioned: 0 Post(s)
Quote:
Originally Posted by tomla View Post
I still plan to just run the stock screen upside down in the warm months.
How and why??
spainy is offline  
post #8 of 15 (permalink) Old 03-23-2010, 11:00 PM
Member
 
Join Date: Jul 2009
Location: Columbia Missouri
Posts: 582
Mentioned: 0 Post(s)
I run with mine in the upside down position, big diff.( 6'1" tall) I am waiting on a shield from Mikes, got a chance to try one on the highest setting, and buffeting from cars/trucks in front of you on the highway all but disappeared. Can't wait to get my shield to try it middle position-the quality and price of Mikes shield was great. Now to just get my permanant shield and I'll be ready to put those miles on as I head to Wisconsin in June.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Fishing and riding,doesn't get any better!!


2009 Lime green Versys
Baldwin reg. saddle w/lime grn. thread and gel insert
Hepco & Becker crash bars
Givi side carriers w/ E21's
Fenda Extenda
Motowerk foot peg lowering blocks & mirror extenders
cut tail fender
black lower panels
Mikesshields Gran Touring, clear
Alaskan Leather Pillion 1 buttpad (trip use only)
Sw-Motech 20mm riser

Versys gone..replace with Victory Hammer
Randy49 is offline  
post #9 of 15 (permalink) Old 03-24-2010, 02:28 AM
Member
 
Join Date: Mar 2010
Location: San Pedro de Alcantara
Posts: 539
Mentioned: 0 Post(s)
Quote:
Originally Posted by Randy49 View Post
I run with mine in the upside down position, big diff.( 6'1" tall) I am waiting on a shield from Mikes, got a chance to try one on the highest setting, and buffeting from cars/trucks in front of you on the highway all but disappeared. Can't wait to get my shield to try it middle position-the quality and price of Mikes shield was great. Now to just get my permanant shield and I'll be ready to put those miles on as I head to Wisconsin in June.

I am also 6'1, why does it make a difference upside down? And on what setting upside down? Let me know as I will be able to make the same adjustments for least wind interference
spainy is offline  
post #10 of 15 (permalink) Old 03-24-2010, 02:36 PM
Member
 
tomla's Avatar
 
Join Date: Nov 2008
Location: oakland
Posts: 577
Mentioned: 0 Post(s)
you gentlemen with the upside down shield questions should just try it and see for yourself...it's a 5 minute job.
tomla is offline  
post #11 of 15 (permalink) Old 03-24-2010, 07:21 PM
Member
 
Join Date: Jul 2009
Location: Columbia Missouri
Posts: 582
Mentioned: 0 Post(s)
You get less wind noise and helmet shake. I have mine on the highest setting.
Give it a try, just take a allen wrench and wrench with you when you ride so you can adjust on the road or flip it back over. i think you'll be surprised of the diff!!


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Fishing and riding,doesn't get any better!!


2009 Lime green Versys
Baldwin reg. saddle w/lime grn. thread and gel insert
Hepco & Becker crash bars
Givi side carriers w/ E21's
Fenda Extenda
Motowerk foot peg lowering blocks & mirror extenders
cut tail fender
black lower panels
Mikesshields Gran Touring, clear
Alaskan Leather Pillion 1 buttpad (trip use only)
Sw-Motech 20mm riser

Versys gone..replace with Victory Hammer
Randy49 is offline  
post #12 of 15 (permalink) Old 03-24-2010, 08:49 PM
Member
 
invader's Avatar
 
Join Date: Mar 2008
Location: Kapuskasing Ontario Canada
Posts: 7,827
Mentioned: 2 Post(s)
The stock shield does work well mounted upside down, even if it can only be done at its highest position... I now have a Mike's Shields tinted sport windscreen in a custom taller 16.5" height. It was creating a vacuum pocket, some buffeting and steering wobble under hard accelleration and at higher speeds. I cut the windscreen mounts, ground the halves down and bolted them back on with flat metal bars (one per side) to have windscreen tilted back as much as it could without touching my handguards at full steering lock. Great improvement. It works perfectly now.


Last edited by invader; 03-25-2010 at 04:02 AM.
invader is offline  
post #13 of 15 (permalink) Old 03-30-2010, 03:48 PM
Member
 
Join Date: Mar 2010
Posts: 5
Mentioned: 0 Post(s)
Randy49, I'm not hitting on Mike's Shields on a web search. I'm 6'5" and looking for some more protection from the wind and would like to see what Mike's offers.

Thanks
jwahl54 is offline  
post #14 of 15 (permalink) Old 03-30-2010, 09:19 PM
Member
 
tomla's Avatar
 
Join Date: Nov 2008
Location: oakland
Posts: 577
Mentioned: 0 Post(s)
I like your "adjustable" windscreen brackets, Invader. That's on my list, too. I was thinking about welding them together after the chop, but I kind of like the bolted together idea. 2 bolts/straps or one plate with multiple holes on each side gives you adjustability. Nice.
tomla is offline  
post #15 of 15 (permalink) Old 03-30-2010, 10:28 PM
Member
 
Pegasus's Avatar
 
Join Date: Oct 2008
Location: St. Peters, MO
Posts: 464
Mentioned: 0 Post(s)
Invader...I like it. Can you post more pics? I sure want to copy it.
Pegasus is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Versys Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome