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Thread: K1100RS Fox Shock

  1. #1
    On the Road 104857's Avatar
    Join Date
    Jun 2003
    Charlotte, NC

    Question K1100RS Fox Shock

    Does anyone know how to adjust a fox rear shock on a K1100RS?
    My bike has one on that was installed before I owned it. I've never made any adjustments because I have no manual. I'm about 75lbs heavier than the previous owner & suspect it could use an adjustment. It seems a bit soft to me.


  2. #2
    Focused kbasa's Avatar
    Join Date
    Mar 2003
    Marin By God County, California
    Hoo boy. This is going to generate some discussion.

    Here's how I set up the shocks on my bikes. Determine what the full amount of wheel travel is. You need to set "static sag", which is how much the shock compresses when you sit on it, to be about one third of the total available wheel travel.

    From there, start adding rebound damping to the point where the bike doesn't cycle more than once after you hit a bump. If it still feels harsh, remove some compression damping (dunno if you have that). Also, you can add some compression damping if you discover that the bike compresses too much over bumps.

    But, given the difference in load between you and the former owner, I'd bet sag is a good place to start.

    When you have it set right, it should feel like both ends of the bike are moving up and down together.

    Here's a good resource

    Dave Swider
    Marin County, CA

    Some bikes. Some with motors, some without.

  3. #3
    Sled Doggs blackfly's Avatar
    Join Date
    Mar 2003
    South of the Circle

    Foxx Adjustment

    Sorry for the tardiness.

    The baseline adjustment is as follows:

    With the bike on the centre stand, measure the vertical distance from the shock mounting bolt on the differential to a horizontal reference point directly above the lower shock mounting.

    Now, have someone spot the bike while you bring it off the centre stand as if you were riding (transfer load to the shock compression).

    The deviation on the vertical measurement from on-stand to off-stand can be between .75" and 1.25"

    That's it for the preload. Foxx supplies a special spanner wrench that fits a 3/8" flex bar. Call them in California or call San Jose BMW in CA. They might have one, too.

    C'est Gut?

    Black Fly BMW Riders
    The (now) Legendary Motorcyclists of New England

    Yankee Beemers

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