2017 Rear Shock - Oversprung or not?
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Thread: 2017 Rear Shock - Oversprung or not?

  1. #1
    Senior Member Fast Eddie B's Avatar
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    2017 Rear Shock - Oversprung or not?

    An Achilles Heel of my new 2017 TDub is the stock rear suspension.

    In a word, it’s jarring over even modest bumps. If I don’t see a bump in time and get on the pegs, I get quite a jolt*.

    My first instinct is that it’s oversprung for my 185 lb weight. My KTM 950 Adventure felt much softer.

    Yet the conventional wisdom on this site seems to be that stock, the TDub is undersprung. So that maybe the jolt I feel is not the spring’s fault for being too firm, but for being too soft, resulting in bottoming.

    Am I on the right track? Before I “spring” for a new spring, my stocker seems to have adjustment available to firm it up one notch.



    Would this be a good first step? I have searched the site and gotten a fair amount of info on options, so I apologize if this has already been covered ad nauseum.


    *Fun ride yesterday on the fire/logging trailsalong the Ocoee River near my N GA home:

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  2. #2
    Super Moderator Purple's Avatar
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    The rear shock changed in 2017 - prior to that year, there was little way of adjusting them - this was (2017) the first year that the adjuster was more obvious, and easier to get at

    On the "old style" shocks, you had to compress the spring, and move a circlip up and down into a new position - so there is no comparison ....
    littletommy, Cornelis, Ken and 2 others like this.
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  3. #3
    Senior Member Fast Eddie B's Avatar
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    I went on a ride with a friend and asked him about my rear spring rate. He said when I sat on the bike, my 185 lb weight seemed to be using up an awful lot of the rear wheel travel.

    Today, I took some measurements:

    Measuring vertically from the floor, through the axle to a predetermined point on the plastic, I measured 28" with the bike unladen, and 26.2" sitting on the bike, for a "sag" of 1.8". If I'm doing my math right, my weight alone is using up just about 30% of the rear wheel travel, advertised as 5.9". I did not measure with the suspension completely unloaded, but could easily do so.

    From that info, would I be advised to go one notch more preload - which is all my 2017 seems to offer? I may futz with that later today - if I do I'll remeasure and report back.
    Last edited by Fast Eddie B; 10-01-2017 at 11:55 AM.
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  5. #4
    Super Moderator Purple's Avatar
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    The older bikes shock deficiencies are well documented, with several "cures" - we're covering new ground here, so keep us informed of developments ....
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  6. #5
    Senior Member Mattwings's Avatar
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    The TW suspension is limited on travel and compliance. Makes it even worse if you run more pressure in the tires for on road. Will be interesting to hear how the 2017 with easier adjustability works, Just my guess, when you reduce preload, it will ride even deeper into the sag and bottom quicker.
    jtomelliott49 likes this.
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  7. #6
    Senior Member Donzo's Avatar
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    I found that my TDub a 2015 I bought late in 2016 w/ 25 miles on it has gotten softer with use.....Or I have just gotten used to it. But I do stand anytime the going gets rough. so that could also be part of why I'm happy with the rear suspension. I bottom out the front suspension often and eventually (when seals need replacing) will get stiffer springs and a thicker fork oil. I weigh around 200lbs and run the tires at 16psi
    Dryden-Tdub and jtomelliott49 like this.

  8. #7
    Senior Member Fast Eddie B's Avatar
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    My thought was to increase preload - I have one more notch available.

    Got the shock off. Any idea on how to compress the spring enough to rotate the collar?

    I can always run it by the Yamaha dealer. I assume they have a proper spring compressor available.
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  9. #8
    Super Moderator Purple's Avatar
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    Looks like a "C" spanner should do it - no need to remove anything

    F7845914-01.jpg
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  10. #9
    Senior Member Fast Eddie B's Avatar
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    Here’s the shock:



    I do have that wrench, but the collar does not have “ramps” to “cam” it up or down a notch.
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  11. #10
    Super Moderator Purple's Avatar
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    It does look a bit “in or out”

    In which case, standard Yamaha TW rear shock rules apply

    Change the shock …….
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