Author Topic: Light rider, stock suspension  (Read 6527 times)

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  • Offline savedzrex   us

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      #10

    Offline savedzrex

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    Re: Light rider, stock suspension
    Reply #10 on: May 11, 2020, 04.01 pm
    May 11, 2020, 04.01 pm
     :460:  Some good set up info......... thanks for posting  :028: :028:
    Let the Good Times Roll...........Amen

  • Offline sacziplock   ca

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    Offline sacziplock

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    Re: Light rider, stock suspension
    Reply #11 on: Nov 28, 2021, 03.19 pm
    Nov 28, 2021, 03.19 pm
    *Originally Posted by C.J [+]
    Another light rider@120lbs/54kg naked(140lbs/64kg full gear), heres my OEM suspension setting, hope this helps..

    Front fork:
    Preload: from stock back out to 3 turns in(stock: 8 turns in), this gave me 37mm rider sag, tried a few hard stops (ABS kicking in) the zip-tie is about 12mm from bottom out.
    Rebound: from stock turn in to 4 clicks out(stock: 7 clicks out), front is now very well controlled.
    Summary: reduce preload and increase rebound, from stock.

    Rear shock:
    Preload: 1 2/3 turns in from stock setting, now about 4 threads showing(stock showed 2 threads), this gave me 41mm rider sag.
    Rebound: all the way out(stock: 1 1/4 turns out), rear is still a tad stiff, but acceptable.
    Summary: increase preload and reduce rebound, from stock.

    Tire pressure: FR: 30psi/RR: 34psi, running Pirelli supercorsa SC2.

    With stock setting and quite high recommended tire pressure on the RR swingarm :114:, I almost couldn't ride the bike, it kept trying to kick me in the butt, pushed me upwards at the slightest little bump and the front was just so jittery and shakey, I had trouble maintaining smooth throttle. :157:

    After adjusting suspension settings, the bike transformed, even just coming to a stop at the red light the bike does not bounce and move unnecessarily. Bike now rides very well, the suspension is taut/sporty but not overly stiff, manage bumps and road imperfections very well, I have good confidence in the bike now, the bike is very easy to ride, very very happy. :082: I will play around with tire pressure some more to see if that improves things further.

    oh, DM's Z9 review gave good indication and his tuning videos are fantastic help!

    i weight the same , ill try that for sure. thanks for that really

  • Online cmds   fr

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    Re: Light rider, stock suspension
    Reply #12 on: Nov 28, 2021, 09.38 pm
    Nov 28, 2021, 09.38 pm
    My weight is 66kg/145lbs without clothes. On my 2020 stock settings were totally off for me. (I was struggling with the back bouncing too much and too much harshness on the front). I removed all the preload on front and rear (1 thread left on the shock) and the rebound is now quite close on the shock. I like to trackday my bike, even with a big compression a 3 strong braking zone, my zip tie on the fork is witnessing I am not bottoming out at all.


    (I've done another trackday since this photo, the zip tie is a bit more down, barely 1 cm)

    For my sporty use, the shocks are now OK (I have less problem putting the power down after leaning), but now, I have no room for tweaking. I am from downhill mountain bike and I like to nerd about suspension, so I would like to get more control for my shocks. Here in France we have got some good manufacturers like EMC and I think I will soon get some  kit front & rear, dedicated for my weight and use.

    https://www.emc-suspensions.fr/en/900-z-2020-2021/10899-pack-suspension-noir-s2-for-kawasaki-900-z-abs-2017-2019-sportshock-2-fourche.html
    Last Edit: Nov 28, 2021, 09.44 pm by cmds

  • Offline 3alfa3   hr

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    Offline 3alfa3

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    Re: Light rider, stock suspension
    Reply #13 on: Nov 28, 2021, 10.59 pm
    Nov 28, 2021, 10.59 pm
    *Originally Posted by cmds [+]
    even with a big compression a 3 strong braking zone, my zip tie on the fork is witnessing I am not bottoming out at all.

    On Z900, fork bottom out is more than 10mm from visual bottoming  (120mm travel, over 130mm measured when forks are extended  - wheel off the ground)
    Last Edit: Nov 28, 2021, 11.01 pm by 3alfa3

  • Offline zed9   us

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    Offline zed9

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    Re: Light rider, stock suspension
    Reply #14 on: Nov 29, 2021, 04.22 am
    Nov 29, 2021, 04.22 am
    Cmds.. I believe your forks have compressed as far as they can judging by your picture. The top of the fork leg won't hit the axle casting. Mine compress slightly less but I have .95 springs installed. The last time I rode it I was 205 pounds in full gear (185 nekked) but have dropped 11 pounds recently since I stopped eating coffee rolls and cider donuts. True story.

  • Offline 3alfa3   hr

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    Offline 3alfa3

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    Re: Light rider, stock suspension
    Reply #15 on: Nov 29, 2021, 09.43 am
    Nov 29, 2021, 09.43 am
    *Originally Posted by zed9 [+]
    Cmds.. I believe your forks have compressed as far as they can judging by your picture.

    I don't think so (dust seal is 9-10mm "thick").
    Just measured extended fork from lower lip of the dust set to the casting on my 2020 Z900. 134mm is visible (chromed fork stanchion).  If there is not some spring (top out spring)  to prevent full extension, 14mm from casting is real bottom out.

    Note that zip tie have some thickness, dust seal touches upper part of zip tie so to be precise, he should measure from upper part of zip tie to the casting and subtract 14mm to calculate how much travel was left. But only if there is no top out spring in fork internals.
    Last Edit: Nov 29, 2021, 09.47 am by 3alfa3

  • Offline zed9   us

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    Offline zed9

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    Re: Light rider, stock suspension
    Reply #16 on: Nov 29, 2021, 02.52 pm
    Nov 29, 2021, 02.52 pm
    *Originally Posted by 3alfa3 [+]
    I don't think so (dust seal is 9-10mm "thick").
    Just measured extended fork from lower lip of the dust set to the casting on my 2020 Z900. 134mm is visible (chromed fork stanchion).  If there is not some spring (top out spring)  to prevent full extension, 14mm from casting is real bottom out.

    Note that zip tie have some thickness, dust seal touches upper part of zip tie so to be precise, he should measure from upper part of zip tie to the casting and subtract 14mm to calculate how much travel was left. But only if there is no top out spring in fork internals.
    The spring coils can touch themselves and is their a hydraulic lock in these forks?
    I wish I had compressed mine all the way when I had them off the bike. I thought full compression was more than 14mm showing.

  • Online cmds   fr

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    Online cmds

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    Re: Light rider, stock suspension
    Reply #17 on: Dec 05, 2021, 08.25 am
    Dec 05, 2021, 08.25 am
    It would be a very bad design if there is some hydrolock or the spring is touching itself.

    Here an other photo just after my last trackday, I was more agressive on brakes, so I went a bit further. Still no bottom out without preload.

  • Offline 3alfa3   hr

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    Offline 3alfa3

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    Re: Light rider, stock suspension
    Reply #18 on: Dec 05, 2021, 08.41 am
    Dec 05, 2021, 08.41 am
    *Originally Posted by cmds [+]
    Here an other photo just after my last trackday, I was more agressive on brakes, so I went a bit further. Still no bottom out without preload.

    But close  :028:

  • Online cmds   fr

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    Re: Light rider, stock suspension
    Reply #19 on: Dec 05, 2021, 09.04 am
    Dec 05, 2021, 09.04 am
    Just the right amount to manage some really heavy shock. The fork isn't diving too much but I would I am sad I can't test some more hydraulic compression.