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Thread: '95 R1100R idle adjustment?

  1. #1
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    Question '95 R1100R idle adjustment?

    Is the idle adjustment on a 1995 R1100R mechanical or, electronic?
    I want to lower the idle from 1500 rpm to 1000 rpm
    If it is mechanical, where on the bike is the adjuster located?

  2. #2
    Day Dreaming ... happy wanderer's Avatar
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    Idle air adjustment is done using the big brass screws in your fuel throttle bodies. Turning them clockwise should decrease RPM. It is good practice to remove them and clean those orifices with throttle body cleaner at least once a year. They get gummed up with black soot. There are small o rings on them as well that harden up and need replacing now and again.

    Adjustment needs to be done with a throttle balancing device unless you have exceptional hearing and experience doing this manually. The baseline setting is accomplished by turning them in all the way gently till they bottom out and back out 1.5 turns on each side. Then you need the balancer (Twin Max, Carb Tune, Harmonizer, mercury stix etc. etc.) attached to the vacuum ports on the bottom (look for small rubber caps) to do this properly.

    If this does not do it, dive into this thread and / or many others here :

    http://www.bmwmoa.org/forum/showthre...le-stop-screws
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

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    Exclamation Thank you!

    Thank you for your insite and help!

    "There are small o rings on them as well that harden up and need replacing now and again"

    I went to, 'Max Stratton's BMW' web-site and looked up the throttle body.
    However I did not find the 'o'ring's' you spoke of?

  4. #4
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by james1300 View Post
    Thank you for your insite and help!

    "There are small o rings on them as well that harden up and need replacing now and again"

    I went to, 'Max Stratton's BMW' web-site and looked up the throttle body.
    However I did not find the 'o'ring's' you spoke of?
    The adjusting screw is part number 18 of the throttle housing assy under fuel preperation fiche on MAX BMW. You are right though, I don't see the O ring listed there either but if you call them I am sure it is available. You can see it in the blowup of the part.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  5. #5
    Registered User roger 04 rt's Avatar
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    On another forum as guy I respect wrote that the O-rings aren't available as a BMW part but can be found at auto supply stores. Maybe, as you said, max BMW carries them on that basis.

    On the max BMW site I saw that the screw and O-ring are $6.38. Seems a waste but it gives you a source.

  6. #6
    MOA #24991 Pauls1150's Avatar
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    I've never heard of the O-rings being available separately; yeah, a waste...
    They are a very tight fit on the BBSs.
    If anybody knows the "new unused undistorted" inside and outside diameters, and what material they need to be, that would be a help...

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    Exclamation Thank you ALL for yor Help!

    Thanks guys!

  8. #8
    Day Dreaming ... happy wanderer's Avatar
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    Now that you guys mention this and the fog is lifting in my memory banks I recall this coming up before and yeah, the o rings come with the BBS. Which is just... silly but I guess it costs $6.38 to find out what size that o ring is and then just go dig around my viton o ring kit from harbour freight or wherever ...

    Also just remembered a warning to never _ever_ use silicone grease on them either or you can ruin your O2 sensor! A small dab of red rubber grease would be acceptable though.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

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    Quote Originally Posted by happy wanderer View Post
    Now that you guys mention this and the fog is lifting in my memory banks I recall this coming up before and yeah, the o rings come with the BBS. Which is just... silly but I guess it costs $6.38 to find out what size that o ring is and then just go dig around my viton o ring kit from harbour freight or wherever ...

    Also just remembered a warning to never _ever_ use silicone grease on them either or you can ruin your O2 sensor! A small dab of red rubber grease would be acceptable though.
    Got it! NO Silly grease. Viton O-rings at Harbor Freight. Now what did I do with my 20% discount coupon??

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    Quote Originally Posted by james1300 View Post
    Got it! NO Silly grease. Viton O-rings at Harbor Freight. Now what did I do with my 20% discount coupon??
    You could use a drop of gasoline or some light mineral oil - 3-in-1 or equivalent, or WD-40, all of which are somewhat lubricious and will vaporize eventually, and which will burn clean.

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