Anyone using K&N Filters?

Discussion in 'GS Boxers' started by Viper5112, Jan 10, 2017.

  1. Viper5112

    Viper5112 Been here awhile

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    #1
  2. Mr. Clean

    Mr. Clean Adventurer

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    I have used them in the past on motorcycles and cars. Never noticed any difference as far as performance, gas mileage, etc.
    #2
  3. jimroid

    jimroid Been here awhile

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    :-)I have used them on cars and bikes and did notice better milage and/or performance.
    #3
  4. Snks

    Snks Been here awhile

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    In dirty environments they suck dirt in.
    #4
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  5. DMilan

    DMilan Been here awhile

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    I have one in my 2010 GS.
    Guy was selling it for 1/2 price over at MOA.
    I already had one in my 2003 Focus.. , found it at a junkyard when I was lookin' for a RR door for it that I smashed into a pole whilst on oxycodone (prescribed).
    Point is, I already had the clean and re-oil kit.

    Anyway

    I think it makes a difference in the throttle response of my GS.
    I feel it at 4,000 and higher RPM, especially when whacking it open a bit more aggressively. I think it pulls noticeably harder, and builds RPM faster with the K&N.
    It's not as apparent in normal reserved riding, which is how I usually operate.
    Never checked fuel milage.

    When I mentioned it to my BMW sales friend, he agreed that IHO, it does make a difference. He's a better and more aggressive rider than I am and, as a sales guy, talks to a lot of riders.

    I can't say that I notice any difference on my Focus.
    I like the car a lot, but poor thing, 130 HP and 2,500+ lbs...
    #5
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  6. ausfahrt

    ausfahrt mach schnell

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    I like K&N air filters as long as they're not used in dusty off-road conditions. The intake sound is cool when you roll on the throttle.

    K&N air filters may shorten your engine life but I'll take the tradeoff for the cool sound. My GS will probably outlive me anyway.
    #6
  7. Snks

    Snks Been here awhile

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    If you like the throaty sound. You can likely achieve the same results with drilling some large holes in the top air filter cover. I have done it with great results using a Af-xied with the F800GSA.
    #7
  8. gusable

    gusable Been here awhile

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    The main advantage of a k&n filter is the lifetime service it provides. You just clean it every 10-20k miles and keep going. In a hot rod car scenario I have seen it give me a car length in a drag race. Proven before and after result.
    #8
  9. YesRush

    YesRush Long timer

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    You might ask if anyone around Dublin like them? There could be a climate thing?
    #9
  10. Loutre

    Loutre Cosmopolitan Adv

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    I use them on both my bikes. mainly because I do 4-5 services a year and I don't always think about buying stuff at the dealer. don't believe it improves performance, but I know that they suck in sand whilst offroad. so keep a paper one if you're into that. or at least a spare somewhere
    #10
  11. PanzerRider

    PanzerRider 2015 BMW R1200GSA

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    I don't notice any difference really. Use it because of the dusty conditions which is the opposite opinion of other posts here prior. It is great for dusty conditions as you can keep cleaning it. Only caveat, don't over oil it.
    #11
  12. Carl Childers

    Carl Childers Ghost in the Machine

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    I use one on my DR 650 but use a foam pre-filter, they pass too much dirt on there own in dusty conditions so for that reason it gets oiled foam on top of it. I have a 1200 Bandit based cafe racer and that one has K&N pods on it's four carbs, being a street bike I don't do a pre-filter. Those two bikes have jetted performance carbs and free flowing exhaust along with engine work, in those two cases the K&N's DO make a big difference in performance. For the time being my BMW will stay bone stock and I plan on using a paper filter for better filtering for all the dust on dirt roads and two track I encounter in my location.
    #12
  13. shinyribs

    shinyribs doesn't care

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    If you can somehow manage to douse enough oil on one to actually enable it to filter, it won't breathe worth a damn. Otherwise, they breathe pretty good, dirt included. They dry out worse than any oil-able filter I've ever used. Constant, messy maintenance for minimal performance gains coupled with longevity issues.

    Had em in the past, but never again. Strictly my opinion, ofc.
    #13
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  14. ACR-COL

    ACR-COL Been here awhile

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    If you use K&N filters you must take care and clean and oil every "dusty" ride.

    For me works very good and improves in gas milege and sound also.
    #14
  15. aGremlin

    aGremlin Been here awhile

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    As already said, you want to be careful with dust. It allows more air flow, which means it filters less. I don't think you'll really notice a performance difference just changing the air filter. I bought mine because of the lifetime factor. I bought it around September 2011 and have done 90k km ish with it... Saved it's cost several times over.
    #15
  16. GS Addict

    GS Addict Pepperfool

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    Not according to K&N instructions. http://www.knfilters.com/cleaning.htm
    This was confirmed verbally with one of their Tech people a few years ago ( I was told their biggest problem was users cleaning the filters too much)
    #16
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  17. lewisjr1

    lewisjr1 Long timer

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    Had one a decade+ ago on a track car that spent more time on the lift that it did on tarmac. Intake sound was clearly louder, and back then I liked that. Throttle response wasn't changed in any measurable way. Maintenance of the air flow sensor & throttle bodies increased due to excess oil moving downstream, but that wasn't a big deal.

    All in all, I'd never do it again. At least on the 11x0 & 1200s, the drop in, paper filter from Mahle, etc. is more than adequate for a normally-aspirated engine. Now if you went turbo, or did some serious $$ engine work, then...
    #17
  18. KiwiKurt

    KiwiKurt Amor Patriae

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    If you ride in dust or water, I'd stay away from K&N. They flow better than stock, but their filtration is generally pretty poor.

    If you want a real performance filter, get the MWR if you are a road guy, or if you are a big off road/dusty conditions guy, the Uni filter with the snorkel tube pre filters. The MWR ]will make power, and generally as much or more as other cotton gauze type street filters. the Unit filter with the filter, pre filter, and snorkel tube filters all installed will probably cost you horse power (based on tests with KTM's, anyway....) but it is a bit more modular.

    Lots of people swear by Sprint filters, but I havent seen much in the way of filtration tests with their proprietary material for me to be too excited about it. Sadly, I think the only way to get the Unit filter kit is through touratech, so you have to pay the Toura-Tax on it.

    the sprint:

    http://www.carpimoto.it/en-RO/43304_PM142S-Sprint-Filter-Air-Filter-for-BMW-R-1200-GS-13-.htm

    MWR:

    http://bellissimoto-2.myshopify.com/products/mwr-standard-he-and-racing-air-filters-for-bmw

    Uni:

    https://touratech-usa.com/Store/UNI-Air-Filter-Kit-BMW-R1200GS-ADV-2013-on-Water-Cooled
    #18
  19. Jack D

    Jack D Been here awhile

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    K & N air filters have been a love/hate or 0/1 subject since inception. Filtration tests that I have read years ago were not positive.
    #19
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  20. younger06

    younger06 Been here awhile

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    I have one in my 2007 R1200GS adventure. Lovely induction noise and I felt that it freed things up a bit at higher revs.


    #20