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Discussion in 'Australia' started by Scotty4x4, Dec 9, 2012.
Well for that price you're not gonna get free whistles are you
First, thanks to the OP for starting this thread.. I've yet to see anyone else bring this up.. thought it was just me having this problem. Also.. love the sense of humor with this crowd.
I suspect I've got the same noise problem with my XD4... very frustrating after spending so much money on an otherwise great helmet.
My two cents:
The noise can be described as a low frequency "base" sound, much like riding in a car with the windows half way down.. really hurts the ears. For me.. it's not the high pitched sound typical with wind noise in helmets. Ear plugs have zero effect reducing the noise because of that.
Not all helmets with a "peak" make "that" noise. When shopping for a new helmet, I test rode my buddies Shoei and it did not make the same kind of noise. I only went for the Arai because the peak was adjustable (sort of)...
The noise has nothing to do with the vents or the shield being open or closed. The noise will completely disappear if you lightly pinch the front of the peak between your fingers... it's like the peak starts vibrating around 40mph and that translates to the deafening sound in the helmet.. and, that's while wearing earplugs. Somehow.. lightly pinching (and I mean very lightly) the peak between the fingers eliminates the harmonic/vibration.
Like others, I partially solved the issue by adding duct tape (hey.. it can fix anything!) to secure the trailing edge of the peak to the helmet.. but like I said.. it's a 50% solution and just plan pisses me off having to put duct tape on a very expensive helmet. I'm motivated to continue testing though to figure it out.
Hoping someone else has figured it out?
Just a shot in the dark but what if you put a small weight under the peak like a sinker ? Bars have weights to stop the vibration.
good call... I actually tried that yesterday with no success, it didn't have any effect reducing the noise. Maybe I need to try again?
What I tried was epoxy bonding a 100mm long x 3mm diameter rod of stainless steel formed to fit in the underside of the peak. The rod was placed in the mid section of the peak from oriented from side to side (need to learn how to post pics!). I'll try something bonded fore and aft on each side of the peak later today.
For testing.. I ride on a normal paved road, and once the helmet starts howling (around 40mph)... I reach up and start pushing and prodding the peak to see what works to reduce the noise while being as careful as possible not to change the airflow. I would have thought that pushing on the peak's mounting points would have helped reduce the noise, but it didn't.
Still curious why so few people report this. I live in Southern California (USA) and haven't found anyone else besides this post with the same issue? I ride a Vstrom 1000 and a GS1200 and the noise is the same. Like I mentioned, I tried my buddies Shoei helmet (same style helmet with peak) and it only made normal wind noises when ridden on the same bikes.
I just came across this thread, My XD4 doesnt whistle but it DID vibrate and hum so bad it blurred my vision. I tried a few things but what fixed it was stiffening the peak. I ended up cutting a piece of wire - probably just coat hanger would do, and shaped it to fit underneath the peak in a U shape. I glued it on with superglue (used araldite first but it wont stick to PE plastic) and viola, totally stopped it. Its a bit hard to see now cause i painted it black but i'll try to take a photo if you want. Cheers, DS
Here, i found a post from another guy who's done pretty much exactly the same thing, but he used tape. I've just quoted his post from another thread to save me taking my own photos.
I have to smile.. just finished testing the same build as both you and your friend made... and I have to say it works pretty darn good.
There's still some noise left, but I'd say it's a 90% solution. Definitely better and livable now.
Jeez, it sounds like they're charging $800 for a build your own kit from this thread!
Someone should email the Arai marketing department the link to this and see if they're impressed :huh
That's great above. I seem to have got use to mine abit now. But when I stand up I remember quickly how annoying it is.
I contacted the seller they couldn't give a shit, contacted there supply and they said it wasn't there issue, and then email arai a few Times saying how many people were complaining online about it. Never got a reply
Yeah, its probably not the best design but its got to be hard to make it work perfectly for everybody. Some bikes dont do it, some are bad some not so. I havent heard of anyone having trouble with vibration in clean air though. Before i fixed mine, i had to ride standing up if i was going more than 40kph, that or take the trail bike.
Also, its not exclusive to Arai, other peaked helmets have the same trouble sometimes as well. Shoei hornets included (even with their 3 mounting points on the peak)
Just curious how you folks have the peak adjusted.
My XD4 is noisy, but just regular windnoise, no whistle.
I keep the peak adjusted "down" as far as possible.
There isn't much space between the helmet and the back of the peak as shown in the earlier pics with the foam tape.
I didn't know the angle of the peak was adjustable? My peak is stock and looks just like the one in the picture.
Also... I drove the last 10 % of the noise out. I did it by securing the trailing edge of the peak to the helmet by wedging two small blocks of wood between the peak and the helmet (left side and right side) just big enough to take all the flex out of the peek. Now, based on the steel rod bonded around the front and sides of the peek and the trailing edge secured to the helmet body, the peek is very rigid. Now that it works, time to replace the wood shims with something that looks decent.
The helmet is quiet now. Still makes normal wind noise.. but no more of the howling.
next step is to build a small scaffold or trellis frame under the peak and add a few pullys and levers for the ultimate in beer can holding, automated earmuff positioning luxury.
If you loosen the screws that clamp the visor and peak on, the front of the peak adjusts up/down about 2".