Help with buffeting - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #1 of 33 (permalink) Old 09-19-2016, 05:41 PM Thread Starter
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Help with buffeting

New rider here. Rode my '06 C50 on the highway this past weekend for a few miles, not pleasant. Was riding at around 70 MPH (actual) and found my head to be vibrating quite a bit from the wind effect, buffetting. Felt like I was one of those little toy football players on those old electric vibrating football board game thingys. The vibration naturally affects my vision (blurring it) making it harder to clearly read text on street signs and generally annoying. I have perfect vision BTW.

My bike is equipped with Suzuki windshield and I wear a FF helmet. I'm 5"7". When I tucked my head a little lower and forward towards the windshield, all become good. Makes me wonder if the buffeting is coming from over the windshield or under or both. The windshield appears to be adjusted to its lowest setting giving me a nice view over it of the street. The rider I bought the bike from was much taller than me.

So not sure as to whether I should raise the windshield or install lowers. This head vibrating, buffeting effect seems to start after 50 MPH or so.

The bike also vibrates at those speeds but that is another story.

'06 C50

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post #2 of 33 (permalink) Old 09-19-2016, 06:05 PM
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Install lowers, works for everyone else.
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post #3 of 33 (permalink) Old 09-19-2016, 06:07 PM
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The highest point of the Windshield should be at the bridge of your nose. You may try raising it to the highest mounting point. You should be looking over it not through it.

Also, the type of helmet makes a difference on buffeting. Your may not be as aerodynamic as others. Is it new technology or old?

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post #4 of 33 (permalink) Old 09-19-2016, 06:48 PM
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Counter Steer is correct, you need lowers. It seems weird, but the buffeting wind is coming from under the shield.
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post #5 of 33 (permalink) Old 09-19-2016, 07:16 PM Thread Starter
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Quote:
Originally Posted by rvcycleguy View Post
The highest point of the Windshield should be at the bridge of your nose. You may try raising it to the highest mounting point. You should be looking over it not through it.

Also, the type of helmet makes a difference on buffeting. Your may not be as aerodynamic as others. Is it new technology or old?
It's a pretty good helmet, Shoei Neotec. I Need to verify that height adjustment in relation to my nose but I definitely don't look through the windshield to sight my forward point ahead when riding.

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Install lowers, works for everyone else.

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Counter Steer is correct, you need lowers. It seems weird, but the buffeting wind is coming from under the shield.
I figured as much. I tried to feel with my hands where the wind was traveling from bottom to top when I was on the slab but couldn't really get a good sense of it with gloves on. Gonna order lowers later this week. Damn bike is a money pit. LOL

Thx Y'all
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post #6 of 33 (permalink) Old 09-19-2016, 08:52 PM
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I had the same issue, built my own lowers with plans from someone on this forum - they work great and make all the difference. Cost me less than $25 to build, but if you don't want to do that you can purchase some - there are plenty out there. Mine are made with plexiglass and some aluminum angle iron and fasten to the windshield brackets. Easy-peasy, Japaneesy!


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post #7 of 33 (permalink) Old 09-19-2016, 09:25 PM Thread Starter
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Originally Posted by bipestuff View Post
I had the same issue, built my own lowers with plans from someone on this forum - they work great and make all the difference. Cost me less than $25 to build, but if you don't want to do that you can purchase some - there are plenty out there. Mine are made with plexiglass and some aluminum angle iron and fasten to the windshield brackets. Easy-peasy, Japaneesy!
I think I saw that DIY lowers thread here somewhere recently. I still have some thin plexiglass left from my saggy saddlebag lift operation but I'd need thicker stuff for lowers. I think I'll bite the bullet on this one and just buy a set.

'06 C50

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post #8 of 33 (permalink) Old 09-19-2016, 09:52 PM
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Originally Posted by EL Pistoffo View Post
It's a pretty good helmet, Shoei Neotec. I Need to verify that height adjustment in relation to my nose but I definitely don't look through the windshield to sight my forward point ahead when riding.






I figured as much. I tried to feel with my hands where the wind was traveling from bottom to top when I was on the slab but couldn't really get a good sense of it with gloves on. Gonna order lowers later this week. Damn bike is a money pit. LOL

Thx Y'all
I've always said that the bike is just a downpayment on the accessories.
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post #9 of 33 (permalink) Old 09-19-2016, 09:54 PM
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Lowers will help, but they will not eliminate the buffeting. The issue is the area of low pressure created as air accelerates over the top (think about an airplane wing.) By reducing the air pressure, the instability it creates is reduced. Your helmet is still going to Bob and vibrate even with lowers if you go fast enough.
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post #10 of 33 (permalink) Old 09-19-2016, 10:16 PM Thread Starter
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Originally Posted by Skrapiron View Post
Lowers will help, but they will not eliminate the buffeting. The issue is the area of low pressure created as air accelerates over the top (think about an airplane wing.) By reducing the air pressure, the instability it creates is reduced. Your helmet is still going to Bob and vibrate even with lowers if you go fast enough.
And that makes sense to me. If I raised my head as high as possible, getting more of the air to envelope my helmet, the vibration seemed to lessen-up. If I tucked up right behind the windshield, all good.

It's a combination of the air flow patterns in relation to the helmet position. It sounds like not having a windshield may eliminate the issue though the torso will have to deal with added drag.

All I can do is try to improve it best I can. I like the windshield so I'm going to try the lowers and take it from there.

'06 C50

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