11GS suspension adjustment

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

  1. shardival

    shardival Adventurer

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    Hello fellow riders.

    On that point, I'm pretty sure my rear suspension's adjuster is not working (I'm rolling it and it's going up and down, but suspension is not). But I have another question. On botton of suspension, there is screw to make it softer/harder (damping). But it doasn't move a bit - that is not normal I assume. What can I do with that? Suspension feels really hard - and my ass don't like it at all :D
    #1
  2. cds247

    cds247 Long timer

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    Assuming everything is in working condition and not frozen up, you can change springs to get a different ride. If you are much less than the target size for the BMW designers (I think ~180 lbs) you may be over-sprung. A good suspension shop can help. There are lots of aftermarket options - I chose Wilbers. Klaus from EPM Performance set them up for my weight and riding style.
    #2
  3. mouthfulloflake

    mouthfulloflake Not afraid

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    The adjuster often needs to be topped off with oil, mine was empty a few years back, and likely is again

    when you turn it and nothing happens, it probably needs to be refilled.

    #3
  4. shardival

    shardival Adventurer

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    I think it's not the problem - looks like suspension is screwed really tight.

    Thanks :)

    Also, that little screw on bottom of suspension - should it be move-able? I think it's for soft-hard adjustment.
    Bez tytułu.png
    #4
  5. mouthfulloflake

    mouthfulloflake Not afraid

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    I am pretty sure mine does move, but I have not tried in years..
    #5
  6. strictlyJDM

    strictlyJDM Adventurer

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    My adjustor moves,

    As far as the preload adj, it doesnt start giving resistance until half way to "high"
    #6
  7. mouthfulloflake

    mouthfulloflake Not afraid

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    thats what mine did when it was low or out of adjuster oil/fluid.
    #7
  8. vagueout

    vagueout Long timer

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    Mr Shardival, the seized in screw is the very important, often neglected rebound damping adjustment screw. They need some penetrant oil applied or sprayed around it and let it sit for a while. Try to free it up by carefully screwing it in and out gently till it feels free and has a travel of at least three turns or more. The screw adjusted OUT is minimum damping and IN is max damping. As to where to set it always start from out or min. damping (soft) and work your way in until the bike feels not wobbly but not overly firm. If you set it too far in i.e. max damping (hard), you will lose traction readily as in the tyre skipping badly over corrugations. As you experiment with the damping adjustment, push down on the back of the bike and observe it rise back up again. With min adjustment the rear will rise up quickly, with max adjustment you will see it rise slowly. If your rear rising is taking more than 1 second that likely is a little too much damping, so adjust out a little. A half screw turn can make quite a difference. All this advice is applicable if your suspension is still working well internally, if badly worn then adjustments don't seem to make much difference. If you can find even a used pair of wilbers or ohlins you will really love this bike. I saw on the news the other night that you must be absolutely frozen up there in Poland, you will have to drink more Polish anti-freeze, better known as vodka.:beer
    #8
  9. shardival

    shardival Adventurer

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    Thanks for tips, really apprecieate it! :D

    I would LOVE to get my hands on Ohlins or Wilbers - unfortunately, that stuff is darn expensive. Can't see any used - but new ones, cost about 1/3 price of my 11GS
    :muutt
    Anyways, will look for them - meanwhile, will fix adjusting knob and that little, damn screw that do not want to turn :baldy

    Yes, winter here was quite suprising. It was like:
    Oh, december 31 - niiiice, I bought new bike yay! My gurl, come for a short trip.

    Few days later:
    We gonna die from cold - bring more vodka! Vodka, vodka for the rescue!
    :freaky
    #9
  10. vagueout

    vagueout Long timer

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    Ha ha, here in sydney it's been hitting 40deg C, more beer, more beer!!:drink
    #10
  11. shardival

    shardival Adventurer

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    Well...I'm jelly a little have to say...
    P_20170113_095702.jpg
    :muutt
    #11
  12. strictlyJDM

    strictlyJDM Adventurer

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    Did this yesterday. What a big difference. Super straight forward
    #12
  13. Drunk_Uncle

    Drunk_Uncle Long timer

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    Just replace the crush washers every time and use a torque wrench on the banjo bolt to prevent future leaks. Other than that good video. May look into that myself on my 1150.
    #13
  14. tjschul

    tjschul Adventurer

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    Hydraulic jack oil??? Not 5 or 10 wt shock oil? Where is this fluid leaking out, it doesnt get used up.
    #14
  15. shardival

    shardival Adventurer

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    Didn't worked for me. Still no suspension adjustment :(

    Also, on top of shock absorber (under seat), there is valve that looks like wheel valve to pump tire. What is this?
    #15
  16. mouthfulloflake

    mouthfulloflake Not afraid

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    nitrogen fill valve?

    some folks say they MUST be filled with only nitrogen

    I figure what we breath is like 78% right?
    put that in there and see if it helps.

    but keep in mind, many shocks are pressurized to like 200 psi or something, so its not easy to do so.

    at your own risk, your mileage might vary, do not try at home, dangerous, yadd ayadda
    #16
  17. vagueout

    vagueout Long timer

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    Shardival, the standard showa suspension unit does not have a valve fitted as you describe unless the unit was rebuilt and a schraeder valve drilled and tapped in to facilitate nitrogen top up. This is sometimes done if the suspension unit has been re-built. When the shocks are assembled at the showa factory a frozen nitrogen "tablet" is placed inside . Are your shocks the original showa items or possibly another brand?:*sip*
    #17
    mouthfulloflake likes this.
  18. strictlyJDM

    strictlyJDM Adventurer

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    I reused the old crush washers because i didnt have the right size. I got back from a three day ride yesterday and no sign of leaks. Ill keep an eye on it but will most likely replace the next time I refill it. If there is a next time...ohlins anyone? =P
    #18
  19. BOPE

    BOPE n00b

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    Hi to everyone!
    Im newbie with gs series bikes (never had one before) and ive just boughted an 11gs 97 model..
    Just love it!!
    My question is about suspensions..
    Does any WP suspension from KTM 950 etc will fit our old lady ? Or Bmw does have specially custom made suspension only for their bikes?
    Ive done the above replacing of rear shock on a AT750 with a WP from LC4 640 and worked like a dream..
    #19
  20. JimVonBaden

    JimVonBaden "Cool" Aid!

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    I don't know of any other manufacturer's shocks that fit the R1100, or any BMW. However, there are lots of aftermarket manufacturers making suspension for them.
    #20