Rear shock spacer
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Thread: Rear shock spacer

  1. #1

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    Rear shock spacer

    Hi guys,
    Sorry for the quality of my english, im french. So i hope to say it right.
    I while ago i read something about a spacer for the rear suspension.
    Im not sure, it was a small block of metal, 6mm thick, and it was suppose to lift the back of the bike and at the same time change the..rake?? of the fork, so the bike was suppose to steer faster without danger of wobbling..??
    Anybody heard of that??
    If yes, can somebody explain, or show some picture how its done, and is the thickness is ok with 6mm ??

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  3. #2

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    Re: Rear shock spacer

    Welcome to the forum Stefato. Yes the 6 mm spacer does make a difference to the turn in. It makes it quicker. Not to everybody choice but i liked it. If you want a spacer i have a few. PM me your address and i will send you one for the cost of postage. Try it out and see what you think. Other members will give you a more technical answer.
    carpe diem

  4. #3

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    Thanks adeyren,
    Do you have any picture of the spacer, and where to install it exaclty ??
    And... is there some difference between... 4-5-6-7mm..??

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  6. #4

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    Re: Rear shock spacer

    Quote Originally Posted by Steftattoo View Post
    Thanks adeyren,
    Do you have any picture of the spacer, and where to install it exaclty ??
    And... is there some difference between... 4-5-6-7mm..??
    It goes on top of the upper shock mount under the frame You can use washers as in this picture or make up/buy a specific spacer

    98 TITANIUM Blackbird
    OzBB.net Administrator

  7. #5
    Supercharged Mod
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    Re: Rear shock spacer

    Quote Originally Posted by Para045 View Post
    It goes on top of the upper shock mount under the frame You can use washers as in this picture or make up/buy a specific spacer
    If washers are used you have to be careful not to make them too large in diameter, there is a 'ridge' on the underside of the cross member which can prevent the washers sitting snugly.

    Quote Originally Posted by Stefftatto
    And... is there some difference between... 4-5-6-7mm..??
    yes there is. The turn in speed whilst quicker than standard with a 4mm spacer it is slower than 6mm. Thicker spacer = faster turn in. What will suit you depends on the tyres you use and how you ride.

    6mm is the favorite thickness among those that use a spacer.
    Full of Hot air? Intercool yourself............ you know it makes sense

  8. #6

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    Re: Rear shock spacer

    Or drop the forks
    Timbo2 likes this.
    The answer is 42

  9. #7

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    Re: Rear shock spacer

    Here is a pic of some spacers I made from scrap aluminum. 1/4" and 1/8" thick. I found the 1/8" works best for me.

    Edit: pics are sideways again. From dig camera thru pc they come out straight, from iPhone, sideways for some reason.
    Attached Images Attached Images
    Last edited by fizzy; 03-27-2019 at 7:24 PM.

  10. #8

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    Re: Rear shock spacer

    G'day all...... no mention of rear shock condition? Have you reconditioned or replaced your rear shockie? When I put an Ohlins shock (and fork springs) into my BB it was way better than the stock unit and the rear didn't sag as much. I also fitted Helibars which required the forks to slide up through the clamps by about 6mm (I think, but I'm no longer sure). My BB steers nicely, but I use Michelin PR4's which I like better than most other tyres (nice profile and feel and huge mileage).

    I don't run a steering damper...... it was not needed, and it just lays on the shelf. Never had a wiggle or wobble...... Bird is super stable.

    My oem shockie is my spare and it is like new with only 13k kms of use...... I install it when my Ohlins needs a service (oil and re-gas or new spring after 60k kms at max load weights) and it is so much weaker than the Ohlins that I have to put the oem springs back in the forks to match the rear....... then I notice how soft the oem suspension is after being spoiled by the stronger but more comfortable Ohlins gear. The oem Showa suspension gives me a sore butt, whereas the Ohlins stuff smooths out the lumps and works far better.



    The spacer will improve handling, but you might need to have a look at your ageing suspension as well (especially if you are two up and load to the max limit).


  11. #9

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    Re: Rear shock spacer

    Not to mention that from the factory the birds are over damped and under spring anyway.

    Tip/trick when installing the shim. Put the bike up in its center stand and loosen the shock bolt from above. The suspension will pull the shock down and you can slip the shim in from the back. Slide it forward until you feel it hit the ledge Duck mentions and then tighten it back down. It's best to use a 17mm deep well socket on the nut.
    XXGUY likes this.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  12. #10

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    Re: Rear shock spacer

    HI i have just put on my serviced ohlins rear shock and i have longer front springs in the front ,,
    but only done 50 miles so far and i removed the shim bike feels great, are you people with Ohlins
    still using the shim the Ohlins tech told me 2 remove it as the way they set it up it was no longer needed

  13. #11

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    Re: Rear shock spacer

    Wayne's mine removed on the Ohlins as well. Hopefully soon trying it out with the new Busa front end.
    carpe diem

  14. #12

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    Re: Rear shock spacer

    OK thanks it certainly went round roundabouts very smooth hopefully will get to try it
    better at the weekend

  15. #13

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    Re: Rear shock spacer

    Wayne
    Yes some of the online have an adjustable length your tuner have added the extra length in. When I scored my body on my original my tuner substituted a newer body that was 4mm longer. So I now run a 2 mm shim along with adjusted length on both my online I run when double up and my Nitron when I run solo.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  16. #14

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    Re: Rear shock spacer

    The ohlins guy did mention that there was a spacer in the shock that maybe why he suggested to remove the shim
    how do you find the Nitron thinking of one for my 636 ninja

  17. #15

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    Re: Rear shock spacer

    Here are words of warning. My first mistake was not having much ride time on my bird before trying this mod. Soon after i purchased my bike several years ago i tried this 6mm spacer and liked how it made the bike turn easier. Little did I know there were other consequences for the quicker steering. My bike was less stable at higher speeds and I had more head shake and wind turbulence. After trying 3 different windshields, double bubble style, touring and finally a stock screen I still wasn't satisfied with how unstable the ride was at 70+ mph. Here is my mistake and the moral of the story. When i finally decided to remove the spacer I noticed that it was not laying totally flat therefore I had more than the 6mm effect which caused my turbulence and unstable ride. This mod installed incorrectly made my ride unstable and dangerous. I only blame myself but this caused me alot of grief. If you try this mod make sure that you don't install this on the lip and that it is flat or you will hate yourself. I never reinstalled the spacer, I have the jaws straight bars and the roller type steering bearings, reworked front forks and rear shocks and the stock screen and I could not been happier. There, proceed with caution.
    SouthTexas11XX likes this.


 
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