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DNA's Filtering efficiency superb for off road
Hi Guys,
Any of you that have concerns if the DNA filter is good for off- road use or in desert conditions use, please visit the following link: http://www.advrider.com/forums/showthread.php?t=440368&highlight=FILTERS and let me know your opinion. I strongly believe that the above thread is the absolute answer, for existing and future customers concerns if the DNA cotton filter is better than a foam filter for off- road use..!!! Waiting for your comments, Dino Nikolaidis DNA Filters |
This is a tough one. In Holland, the message is spread that the K&N and DNA filters are not as good as paper filters for off-road and dusty conditions. Foam filters are the best but need more maintenance.
I am no expert in filters and can not contribute to the discussion. But I am a little bit suprised that the DNA website does not discuss this issue. Also, wouldn't it be nice if your racing department would show a couple of MX or Rallye riders? I am very interested in DNA's view on this issue. Just my 2 cents ... |
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I am prepairing a detailed reply to your request. Thanks Dino |
This thread looks suspiciously like an advertisement...ahem.
xxx |
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:evil5: :coat: |
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I look forward to hearing more about his products, and who knows, even trying one x J xx |
I do have one question regarding DNA filters, from a different angle than most.
In my case although I like the sounds of the gains from using a DNA (or other) cotton based filter my understanding is that they let in more air (and therefore dust) than a standard paper filter. Given that I'm doing 25k+ miles a year on my bike engine life will be an important factor. Am I right in thinking that I would be best sticking with the standard paper filter to increace engine life (I'm hoping for 100k miles plus)? |
Performance Air filters test by MOTO Magazine, France
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First of all thank you for your time and aggressive comments; I have joined the XT 660 forum to answer all requests and concerns that users would have and finally put an end to all the bull�t that people hear, using independent tests, plus tests that we do with our Hi tech equipment. The post that you have seen at the WWW.ADVRIDER.COM forum amazed us also, not even our advertizing department could do better! That was a brilliant presentation! But unfortunately for our competitors and fortunately for DNA it is 100% true, and we know it very well because we see it every day and know it is time to spread the word, so people will stop thinking that the DNA filter is just another filter that looks like a K&N. So to start I have attached a test done by the French motorcycle magazine MOTO. Τhe test was done unbeknown to us AND TO ALL THE OTHER manufacturers; the mag also purchased the filters from random stores and no one knew anything until the magazine was published. The test is in French but you can easily understand it. To guide you thru, they used a Honda CB 1300 S and tested, DNA, K&N, BMC, GREEN and the stock Honda paper filter. They used the test facilities of an independent laboratory called �CETIAT le Centre technique des industries aerauliques et thermiques� the French forum members should know it. They tested: � Fitting and sealing of the filters � Filtering efficiency � Air Flow � Performance Dyno tested � Evaluated the overall quality � Simulated the actual cost the user would pay for 72.000 km Well guess what� the DNA filter was best in all tests except the simulated cost� ��..DNA was second with 9 euro difference! But do you care? If the filter you choose to use is First in filtering efficiency, First in overall quality and fitting, First in performance, First in air flow�! Does 9 euro make a difference for 72.000 km of usage? If you try to divide 9 by 72.000 the calculator displays 0.000125 euro/km thats what you have to pay more to use the very best of all the filters. And finally you must understand that the DNA filter flows more and performs better because of its DESIGN and the superior materials we use, we at DNA will NEVER produce air filters that have a filtering efficiency lower than 98%, that is the same filtering efficiency you are getting from your Yamaha paper filter with almost half the flow! I hope you will enjoy reading the attached pdf with the test. Looking to hear your comments, Regards Dino P.S. stay tuned because we are almost done with some back to back testing of the DNA versus the K&N XT 660 X / R filter and you will be SHOCKED��with the results! |
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I have replied to your questions, please see deiccords post. Regards Dino |
Hi Dino - no problem, I wasn't fully aware of the situation (until CaptMoto explained), and when I see links to anything that is posted on ADVrider, I always take what is said with a pinch of salt...
I'm interested in your filters myself... I presumed it was similar to the K&N system which you also lightly oil with a spray before installation? (I used one of their filters on my XR650R for a few thousand miles, before reverting to the foam and oil type UNI filter for racing...) However, it looks like your system remains dry (like the stock filter) presumably? I'd certainly be interested in the comparision with your filter & airbox lid compared to the stock Yamaha set-up... xxx |
Would i be able to fit the DNA and the stage 2 top without changing the fuel mixture and exhausts?
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yes, many of them done just that but Kev has a new mod for the Tenere who will make things a lot smoother and its a cheapo mod at that so if you know what's good for you.... Ask Kev :laughing7:
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xxx |
didnt wanna spend PCV money... will wait....
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i.e. clogging and simulated cost (as you stated) just thought I'd correct the statement above.. :YellowWink_VZHUX5: I have no doubt the DNA is a good product though.. |
I can vouch for the filtering quality of the DNA filters on the Tenere - I used three (one changed each day) on the Heroes-Legend rally, and no dust passed through the filters whatsoever - very impressive.
The only 'criticism' I have (and have seen reported elsewhere) is that the filters did not seat snugly against the stage II airbox lid - you were able to rotate the drum with your finger even when the lid was screwed down tight. Now this may be down to manufacturing tolerances at Yamaha (but I doubt it, as it's a one-piece moulded airbox with a metal seat attached), but just to be aware - I solved the problem by placing a large rubber O ring in the seat under the filter to lift it, and it then sealed tightly. J x ps. this message was brought to you independently, at no time has DNA sponsored me, nor have I been given the opportunity to purchase said products at anything less than full retail price. Of course, should that change, I will endeavor to be even more gushing about the product, media whore that I am... |
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It is not, therefore, an inexpensive replacement job of one for one. After the filters and PC have been fitted the bike will also need to be tuned as no two engines are the same? Be prepared to part with some cash. Disclaimer; What I know about modern motorbikes is zero. This knowledge has been learned the 'hard' way, lol. My DNA set up (1 to 3) arrived yesterday and I am waiting for the PC to be delievered presently. I shall let you know how I get on after installation. My best to you and yours, Ryland. |
As Ryland explains (and for anyone else not aware) - the DNA is not just a 'replacement' for the stock Yamaha paper filter, but is a freer flowing filter - thus allows more air into the engine (together with the Stage 2 open airbox lid, significantly more air). Even though the bike is EFi and has various sensors, you cannot expect the standard ECU to compensate for the extra air as it is beyond it's typical parameters...
However, it must be said the stock ECU does seem to compensate for [i]less[i/] air rather well - typically found at high altitude (Pikes Peak peak has hald the air than you find at sea level for example) - but of course all that is going to happen there is it will run rich, rather than lean, and thus less likely to cause any lasting damage to the engine. As Ryland says, the real benefit of fitting an open airbox/free-flow filter is only in conjunction with having the fuel set up properly to match - then you can expect some noticable improvements in power and power delivery. However, it is best done with a freer flowing exhaust too, and that all adds up - ultimately, you have to consider what it is you want from this bike and the modifications? J xx |
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Ownership is proving a LOT more costly and complicated than I had anticipated. It is fine to see the bike in the showroom and make the initial purchase but then there are the 'extras' and they really do add up. Insurance came as one hell of a shock! Crash bars, back box, helmet's, boots, trousers, coat's, gloves, DNA full kit and the power commander. I dare not mention the final bill? Lol, cough, choke. Service costs. I dropped her so that was more expense (my own fault). No way am I going to change the exhaust system, 2,000� for the Akrapovic! I think we have all got to find our own ceiling of expenditure, I have reached mine, in fact surpassed it! Lol Enjoyed ever second of it though. I had no idea that changing the air filter would take me where it has in terms of further purchases. I should have done a lot more home work before diving in. Expensive learning curve. I hope it will prove worth it when the bike is finally set up. Just waiting for the PC to be delievered then I will try and fit it, fail and end up paying my Yamaha garage to fit it for me! Lol Don't smoke, don't drink, don't gamble........what the heck! Ryland |
You would not like to know how much money I have put into my XT mods over the years, please don't tell my wife Ha Ha.
I still want to do a big valve head & stroker crank. |
@ DNA question for you
much is said about filtering with the dna stage 2 filter , but what about the airbox one for the tenere , I'm fitting mine because I want the ten to be more alive without paying to much for a power commander etc , so I'm going with the stage 2-3 and kev mod ... but I'm a little bit afraid of taking this filter offroad , captmoto already answered me in a previous topics that there exists a gasket to block water to be accessed via the airbox filter into the airbox , but I can't find anything about it on the dna website ... secondly , if you use the filter for daily offroad use , will that work , I will I have to clean the filter after every ride you think ? Normally the side filter doesn't get so many splashes of mud and water , but I can not believe you guys made a filter for a offroad capable bike , but only to be used onroad ... |
I agree that having the side-panel filter exposed like that is going to attract more dirt - it's like the XR650R K&N filter, but the XR still has a side panel over it...
To be honest, I'm not sure how much of a gain you will get using the Stage 3 set-up (ie. replacement side panel) on the Tenere - not without a Power Commander, dyno set-up, new exhaust, removing the AIS and Lambda sensor etc etc etc. too? I'd also suggest that chasing the very last horsepower is really not what this bike is about, especially off road? For what it's worth, I have the DNA Stage 2 filter (that is the drum filter and open airbox lid/snorkle replacement), together with a PCV, SR exhaust and the AIS/Lambda removed... this is the set-up I rode to Dakar on the Heroes-Legend rally... simply changed/cleaned the drum filter every night - no problem. Performance wise, it's more than enough! Jx |
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I'm pretty sure Kev has stated somewhere that you wouldn't be able to add anything like enough fuel using the Kev Mod to compensate for the massively increased air flow of the S3 filter. |
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Sure the man will clear it up. |
I'm perfectly prepared for the possibility that I'm wrong.
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well with the kev mod (latest one) turned to 9 and this side filter , the difference is huge ! yesterday I drove for about a half hour on the highway around 130km/u and the bike was running so smooth ! even on lower revs in town I don't have the feeling of being so nervous on the throttle meaning the bike responses much better when I slightly open throttle ... so for me it works out fine, haven't been offroad the past days as everywhere it's all deep mud now with the rain of the past days ... captmoto was talking about something DNA sell's as extra to seal the filter side for water etc , some I'm rather curious how this will look and when to get it , also mailed dna directly , awaiting their reply ... but serious I found it strange that so few people are using this filter while the difference is quite big ..., so I will be a serious guinny pig for DNA :) (or how to write that) |
I was thinking of fitting the stage 3, but after looking at the performance curves I figured that the main benefit over the Stage 2 was at higher revs so guessed that it would not benefit me off road or more importantly to me doing the touring, small roads kid of riding.
Would be interested to hear differently tho. Benefit over St 2 pulling at lower revs???? |
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http://www.xt660.com/showthread.php?t=17126 |
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