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Thread: F-Twins Tech - F650/700/800 - Air Filter Replacement

  1. #1
    Registered User drneo66's Avatar
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    F-Twins Tech - F650/700/800 - Air Filter Replacement

    The articles, posts and comments in this tech section are posted by individual members and reflect their personal thoughts and experiences with repairing, maintaining, and generally working on motorcycles. This information may require specific knowledge and skills, may or may not be correct or current to model.

    The authors of information found here and the BMW MOA take no responsibility for ensuring the accuracy of any information (including procedures, techniques, parts numbers, torque values, tool usage, etc.), or further for any damage of any kind or injuries incurred or caused by anyone following the instructions or information found here.

    It is the duty of the individual to either assume the liability himself for responsibly using the information found here, or to take the bike or accessory to a Dealer or other qualified professional service.


    Lastly, please ensure you dispose of your used chemicals, oils and fuels in an environmentally responsible manner. Most Auto Parts stores and service stations will accept used oil and lubricants, tires and batteries, please check for your local availability. Here's a link where you can look up a place to dispose of your used fluids (oil, coolant, brake fluid, etc.) - http://earth911.com/

    This article, text and photos are Copyright of the individual authors and the BMW MOA, any copying or redistributing is permitted only by prior written authorization.

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    Changing the Engine Air Filter on your on your BMW F650, F700, or F800 Twin-Cylinder Motorcycle



    Note 1: The specific bike shown is a 2013 F800GS, but the filter change should be applicable to all twin-cylinder F650, F700, and F800 bikes and models. How you get to the filter will be different on other styles of F-Twins (ST, GT)
    Note 2: The tools and materials used are by personal choice and are not due to any affiliation with any brand


    Materials Required:
    - Air Filter - BMW Part Number: 13 71 7 678 281


    Tools Required:
    - T25 star (torx) bit
    - T27 star bit
    - ratchet extension
    - Ratchet(s) that fits both of the above
    Last edited by drneo66; 03-08-2021 at 01:40 PM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  2. #2
    Registered User drneo66's Avatar
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    The filter on the F-Twins is located underneath the faux gas tank "hump". To access this area on the GS, we need to remove six screws.

    With your T25 wrench remove the four screws on the top of the plastic (indicated by the red arrows)
    Note - your bike may be cleaner than this example


    IMG_1132.JPG
    Last edited by drneo66; 03-12-2021 at 01:36 AM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  3. #3
    Registered User drneo66's Avatar
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    Next we will need to remove the two screws near the ignition, one on each side. Again your T25 is the correct size for these bolts

    IMG_1133.JPG
    Last edited by drneo66; 03-12-2021 at 01:36 AM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  4. #4
    Registered User drneo66's Avatar
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    If you have the accessory electrical plug by the ignition, this connector will have to be unplugged. Gently press on the tab by the wires at the end of the connectors and separate the connection. Set the top plastic aside someplace safe.

    IMG_1135.JPG
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  5. #5
    Registered User drneo66's Avatar
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    The air filter is located underneath the black plastic housing, "south" of the battery. Take a moment to clean the area of any dust and road debris, as we don't want anything to fall into the air box.

    First, gently remove the wire that is attached (indicated by the blue arrow) to the air filter housing. We do not need to remove the actual connector, just the wire from the plastic clip. Next, remove the T27 screws (as indicated by the red arrows).

    IMG_1147.JPG
    Last edited by drneo66; 03-12-2021 at 01:36 AM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  6. #6
    Registered User drneo66's Avatar
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    After these bolts are loose, we can gently lift the air filter cover out of the way to reveal the air filter (orange in this case)

    IMG_1149.JPG
    Attached Images Attached Images
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  7. #7
    Registered User drneo66's Avatar
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    Take a moment to make sure that no debris has fallen into the airbox. If it has, use a clean shop rag or paper towel to carefully clean it up. Do not use a vacuum, as the air box could potentially have gas fumes in it.

    IMG_1151.JPG
    Last edited by drneo66; 03-12-2021 at 01:37 AM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  8. #8
    Registered User drneo66's Avatar
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    The steps to install the new filter are reverse of disassembly:

    - Install the new filter (I like to use a permanent marker to write the date and mileage of the filter change on the actual filter)
    - Install the black, plastic filter cover and gently tighten down the T27 screws to just snug (these threads are going into plastic, so they can easily be stripped)
    - Gently place the wiring back into the wire holder
    - Grab the top plastic and plug in the accessory connector
    - Using your T25, screw in each of the six screws: four on top, and two on each side of the ignition (again screw to just snug)
    - Note the date and mileage of the filter change in your owners manual
    - Ride off into the sunset
    Last edited by drneo66; 02-10-2021 at 11:30 PM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

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