Oil change - BMW F800 Riders Forum & Registry



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  1. #1
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    Hi there, this is my first post. I have a 2009 F800ST and I want to do an oil change. I don't have a manual. The sump plug appears to be a Torx 55. Can anyone confirm this?

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  3. #2
    Richard230's Avatar
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    Welcome to the forum. I just checked my 2009 F650GS, which should have the same engine as yours. The oil drain plug is a standard 24mm hex bolt.
    Richard - Current bikes: 2016 BMW R1200RS, 2018 16.6 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

  4. #3
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    15/16 actually fits better than 24mm for my ‘07 ST drain plug.
    They’re basically the same size, with the 15/16 being a few thousands under size.
    Cheers, Harvey
    07 F800 ST 

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    Bogbody's Avatar
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    Unless of course someone has changed the standard plug.
    Carefully try a T50 torx and Allen key. By the way I thought the 24mm refered to the thread size???
    It should be obvious which fits properly.
    On my 2016 GT its a hex (Allen) recess.
    F800GT in blue known as "The Blue Bat"
    Based near Peterborough, Cambridge, UK 

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    Richard230's Avatar
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    Quote Originally Posted by Bogbody View Post
    Unless of course someone has changed the standard plug.
    Carefully try a T50 torx and Allen key. By the way I thought the 24mm refered to the thread size???
    It should be obvious which fits properly.
    On my 2016 GT its a hex (Allen) recess.
    When I mention bolt sizes I think of the tool needed to loosen the bolt. I rarely have any idea what the actual diameter, thread size, pitch, etc. is of a fastener. All I ever care about is the tool needed to loosen and tighten the fastener - and where it is located in my tool box.
    Richard - Current bikes: 2016 BMW R1200RS, 2018 16.6 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

  8. #6
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    Sorry for the confusion.
    I use a 15/16 socket on the drain plug on my ‘07 because I do not possess a 24mm socket, and they are the same size anyway.
    i do have a 22&23mm for my milling machine. And a 26mm for my tractor.
    a lot of the larger metric & imperial tools will interchange.
    i actually have a 1-13/16 socket if I ever (God forbid, knock wood) have to replace the infamous rear wheel bearing.
    cheers, Harvey
    07 F800 ST 

  9. #7
    Sundog52's Avatar
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    Quote Originally Posted by Bogbody View Post
    .....
    On my 2016 GT its a hex (Allen) recess.
    10mm
    Sundog 

  10. #8
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    It's confusing because there are two bolts used, Sundog is right, it's a 10mm Allen. I have an 08 F800ST which has a 24MM Hex bolt (not socketed) which requires a 24MM socket, a 15/16" socket will also fit as it's only about 0.0074" smaller (hence the tighter fit some people are mentioning). The newer bolts being used by BMW are M24x2 but are NOT hex, they have a 10MM Hex shaped recess (Allen).

    This is the newer bolt that came out sometime around the 2008-2010 timeframe so you can confirm, this is the one that uses 10MM Allen.
    Click image for larger version. 

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