Author Topic: Bad helmet vibration at speeds over 160mph (blurred vision) (Read 7358 times) Tweet

Mr. Demeanor · « **on:** April 03, 2005, 09:04:42 PM »

The last couple of times I have run up the speed I have run into some bad helmet buffeting. I have a ZG double bubble and am as tucked as possible wearing a Shoe RF700 (I think...might be a 600). Today it got pretty bad at 160 and by 175 my vision was so blurred I had to back out of it. This was running with the wind. I did lose a lot of weight and my helmet is slightly looser than it used to be but not what I would call too loose. Yes, apparently I had a fat head. My impression was that if the helmet was tighter the problem would have been just as bad. Anyway, thought this would be the right forum to ask. What kind of helmets are you guys using.

02SE · « **Reply #1 on:** April 03, 2005, 09:50:01 PM »

I've had good luck with my Arai Signet GT.

Mr. Demeanor · « **Reply #2 on:** April 03, 2005, 09:57:26 PM »

One of the problems I have with helmets is I have kind of a prominent nose and chin. The Shoei are kinda pointy in front and give me some more room.

RZ350 · « **Reply #3 on:** April 03, 2005, 10:00:13 PM »

I took this Arai up to 242, no issues at all.

Even at 175-200 MPH when I would sit up slightly on decel, no buffeting at all.

Hank borrowed it and went 220 or so on a test run, I don't believe he had any buffeting problems.

Does your helmet have vents on it?

02SE · « **Reply #4 on:** April 03, 2005, 10:03:21 PM »

You need to try on whatever particular helmet you're looking at. The only Arai model that fits me, is the Signet GT, or Signet GTR.

A Shoei RF-700?, that has to be at least 8 years old?, treat yourself to a new lid.

I had an RF-700 too, maybe the Arai Signet GT/GTR would fit you?.

02SE · « **Reply #5 on:** April 03, 2005, 10:06:24 PM »

That was a cool day Troy, I should've taken a picture of the look you had on your face, when Jason and I picked you up at the end of the course.

Mr. Demeanor · « **Reply #6 on:** April 03, 2005, 10:18:39 PM »

Yup, its time for a new lid. Just doing a little homework. Yes the shoei has vents.

Blackhawk · « **Reply #7 on:** April 05, 2005, 08:05:01 AM »

I just bought the Shoei X-11. This helmet is so comfortable and so light...

I have a Suomy Gunwind now, and I like it. But when I went to buy a brand new one, I tried the new Suomy, the Arai RX7RR, Arai Quantum, Shoei RF-1000, and the Shoei X-11. For me, there was no doubt.
But everybody's head is shaped differently, so it's no secret that you should try them on before making a final decision...

DaveO · « **Reply #8 on:** April 05, 2005, 06:27:38 PM »

Stroke,

I get some buffeting at Maxton when I raise out of my tuck.....this is with my Arai....I'm sure most helmets will be the same....you are in the "dirty air" off the windscreen....

Can you tuck lower???

Dave

SPEED KING · « **Reply #9 on:** April 05, 2005, 11:19:14 PM »

Quote from: Blackhawk

I just bought the Shoei X-11. This helmet is so comfortable and so light...

I have a Suomy Gunwind now, and I like it. But when I went to buy a brand new one, I tried the new Suomy, the Arai RX7RR, Arai Quantum, Shoei RF-1000, and the Shoei X-11. For me, there was no doubt.
But everybody's head is shaped differently, so it's no secret that you should try them on before making a final decision...

I have a Shoei also and I have gone 220mph with no front bodywork and I can see fine..I have also gone over 250mph with the same helmet, are you lying the helmet on the tank as you are running? I ran another brand two years ago and went similar speeds with no helmet problems, it could be that the hemet that you have is not the correct size for you and is moving around too much..

Mr. Demeanor · « **Reply #10 on:** April 06, 2005, 12:39:53 AM »

The helmet has loosened up a bit as I lost a bunch weight per my first post. Doesnt seem that loose though...just not as snug as it used to be. It was also pushing back against my chin and nose more than I remember so maybe ithas loosened up a lot. I get down as low as I can go at 6'4". I might be able to get lower w/o the hump on. Is the shoei you use also and x-11? That one keeps coming up in my research as a great helmet with outstanding ventilation which is a big factor here in Florida.

SPEED KING · « **Reply #11 on:** April 06, 2005, 12:41:41 AM »

Quote from: Powerstroke

The helmet has loosened up a bit as I lost a bunch weight per my first post. Doesnt seem that loose though...just not as snug as it used to be. It was also pushing back against my chin and nose more than I remember so maybe ithas loosened up a lot. I get down as low as I can go at 6'4". I might be able to get lower w/o the hump on. Is the shoei you use also and x-11? That one keeps coming up in my research as a great helmet with outstanding ventilation which is a big factor here in Florida.

I think my helmet is an RX-8?

J

THEMOTORHEAD · « **Reply #12 on:** April 10, 2005, 07:58:37 PM »

ITS NOT THE HELMET
ITS YER TUCKING
MOVE YER HEAD TO DIFF AREAS
IT WILL GO AWAY
PUT THE VERY TIP OF IT ABOVE THE SCREEN
TRY IT IT WILL WORK
BEEN THERE ALOT OF TIMES
YOULL FIND A SWEET SPOT

DaveO · « **Reply #13 on:** April 10, 2005, 09:42:05 PM »

I agree, you need to change your tuck. Try to get under the paint like this.....

Dave

Mr. Demeanor · « **Reply #14 on:** April 10, 2005, 11:00:08 PM »

The other day when this was happening I tried moving around. At 6'4" getting flat is tough. I have to actually lift my ass and slide back to get behind the screen. That makes cranking my head back far enough to see under the edge of the helmet pretty tough. The best
i could do was to put the front of the helmet just above the visor right against the windscreen. When I tuck like the guy in the pic i cant see above the guages. Guess I need to work on my neck flexibility as well. Going hemet shopping tomorrow.

RZ350 · « **Reply #15 on:** April 10, 2005, 11:07:36 PM »

That may be your problem, the tuck...

DaveO · « **Reply #16 on:** April 10, 2005, 11:19:20 PM »

Stroke,

It is tough to get low and see....The eyeport on our helmets is too low to see out of tucked in tight. There was somebody(roadracer) who sells helmets with an extended height eyeport...Think he worked at Vanson.

The guy in the pic(me) can barely see the track tucked in that low....but that is at Maxton...and one of the reasons I run so well there.

Dave

Mr. Demeanor · « **Reply #17 on:** April 10, 2005, 11:41:19 PM »

You look fairly tall as well.

Oz Booster · « **Reply #18 on:** April 11, 2005, 04:03:57 AM »

Slammed tank seems to help , puts your body at a better position and takes some angle out of your neck.

mike spisak · « **Reply #19 on:** April 13, 2005, 06:42:41 AM »

all i know is last year when i lived in miami we would top out all the way down krome to the 9/10 road,(about 50 miles from my house),that would give you a nice neck ache for a couple of hours,has that ever happened to any of yall

Mr. Demeanor · « **Reply #20 on:** April 13, 2005, 09:54:30 AM »

I finally found one dealer about 50 miles from me that has a decent selection of helmets. Going up there tomorrow to try on some stuff and see what fits well. Thanks for all the suggestions.

Mr. Demeanor · « **Reply #21 on:** April 15, 2005, 08:18:40 PM »

Ordered a Shoei TZ-R Halex today. $445 at the dealership. $295 from Helmet Harbor delivered. Thanx for the help.

Mr. Demeanor · « **Reply #22 on:** April 23, 2005, 04:26:25 PM »

New helmet arrived today. Sure is purdy. Im sick as a dog but lookng forward to seeing how she does on the top end. Damn this thing is light and tight!!

DaveO · « **Reply #23 on:** April 23, 2005, 04:34:09 PM »

Let us know.....

Dave

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Author Topic: Bad helmet vibration at speeds over 160mph (blurred vision) (Read 7358 times) Tweet

THEMOTORHEAD