Fork oil specs

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Fork oil specs

This is a discussion on Fork oil specs within the Z1K/Z750 Maintenance forums, part of the Kawasaki Z1000, Ninja 1000, Z800, Z750 & Z-750S category; Anyone know what the stock fork oil weight is? How much fluid do they hold? I'm about due to change mine out....

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Thread: Fork oil specs

  1. #1
    Supreme Being Compstall's Avatar
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    Fork oil specs

    Anyone know what the stock fork oil weight is? How much fluid do they hold? I'm about due to change mine out.
    - Brent
    '03 Z1000, gone as of 17 Oct 2011 :/

  2. #2
    Rising Star Mike47's Avatar
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    I dont remember the weight oil I used, when I get home I'll look and post. But make sure you check the manual for the amount because one leg takes more than the other. My dealer supposenly looked this up and told me to use equal amounts. After putting in the dealer recomended amount, I only had about 1" of travel. Way to much oil. Dont trust the dealer look it up yourself. Heres the link if you need it. http://zed1000.free.fr/manuel/manuel.pdf

  3. #3
    Site Elder climb21cj's Avatar
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    I believe its a 5wt fork oil. I can't remember the numbers, but on the stock forks they are not equal. The right fork has the rebound adjuster, which takes up more room, so less fluid will fit in.

    The left fork will hold more oil. Be sure to measure the space from top of fluid to top of fork. I needed more oil than the manual specified.

    edit: 5wt goes in the 636 forks, ss8 fluid goes in the z1k
    Last edited by climb21cj; 05-23-07 at 08:01 AM.
    go green, or go home

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    Site Elder ProZac's Avatar
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    I went through this last month when I did my fork oil. I was told by two kawi mechanics from different dealers that the stock oil weight is 7.5
    It's called Showa SS-8
    I just replaced mine with 7weight Maxima Racing Fluid.

    If you don't have the proper tools for inverted forks it's gonna be a pain to do.

    Right fork leg takes 13.01 US oz when changing fluid and the left is 13.52 US oz

    Best to measure it from the top of the outer tube though when fully compressed and no spring. Right leg is 2.44" +/- 0.08" and left is 1.85" +/- 0.08"
    Len - Z1000 Barrie

    Air box mod, PCIII USB, K&N, Custom BlueFlame slipons, Fender eliminator, LP SS turn signals, PBR frame sliders, Motovation engine case sliders, Kawi taller windscreen, NBM SS front/rear lines, 636 shock, Skidmarx BP, Pazzo levers, Rizoma Circuit 851 mirrors, Corbin seat, Grip warmers, Dual headlight mod, BT014's, and mostly blacked out.


    Check out our website The Brake's Site

  5. #5
    Supreme Being Compstall's Avatar
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    Just found it in the manual.

    Well, the viscosity doesn't help, as it specifies Showa SS-8, whatever that consists of.

    13.01 oz. for the right side

    13.52 oz. for the left side.

    Complete disassembly takes a couple ounces more.
    - Brent
    '03 Z1000, gone as of 17 Oct 2011 :/

  6. #6
    Supreme Being Compstall's Avatar
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    Quote Originally Posted by ProZac
    I went through this last month when I did my fork oil. I was told by two kawi mechanics from different dealers that the stock oil weight is 7.5
    It's called Showa SS-8
    I just replaced mine with 7weight Maxima Racing Fluid.

    If you don't have the proper tools for inverted forks it's gonna be a pain to do.

    Right fork leg takes 13.01 US oz when changing fluid and the left is 13.52 US oz

    Best to measure it from the top of the outer tube though when fully compressed and no spring. Right leg is 2.44" +/- 0.08" and left is 1.85" +/- 0.08"
    Hey thanks for the info, I'll probably use the measurement method at the top of the tubes. Best info I've found so far is the SS-8 fluid is a 10 weight fluid. Seeing that bikes are built for 150 lb riders, I think I might just go to a 15 weight if I can find it.
    - Brent
    '03 Z1000, gone as of 17 Oct 2011 :/

  7. #7
    Rising Star RacingTiger04's Avatar
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    changing fork fluids.. im definately new to this type of maintenance.. how often should it be done and how much effort does it take?

  8. #8
    Site Elder climb21cj's Avatar
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    Quote Originally Posted by RacingTiger04
    changing fork fluids.. im definately new to this type of maintenance.. how often should it be done and how much effort does it take?

    Its not difficult, if you have the right tools.

    Looking at the manual the z1k uses a different spring compressor than the 636, but I can't figure out how it stays compressed. it looks like somebody has to hold it in the compressed position while the plug nut is loosened. that is what i had to do last time, and its a PITA. i modified my spring compressor so i can do the job alone. i am going to test it out tomorrow if things go right.


    as far as the weight is concerned, the z1k takes the ss8? im guessing a 7.5 weight. i put a 5w in my 636 forks, pretty sure thats what they called for.
    go green, or go home

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    Site Elder ProZac's Avatar
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    I borrowed a ******** kit from a friend. It had all the right fittings for every bike. The spring compressor was universal though. It worked fine on the bike. It was just a ring with threaded holes in either side. Push it down and slide the little fork thingie under the top nut. Without the tool I think it would be pretty difficult.

    Also I think if you put 15wt in you will need to revalve. There's no way that 15wt would even move through the stock valves. You will have so much compression damping it will feel like you have no suspension at all.
    Len - Z1000 Barrie

    Air box mod, PCIII USB, K&N, Custom BlueFlame slipons, Fender eliminator, LP SS turn signals, PBR frame sliders, Motovation engine case sliders, Kawi taller windscreen, NBM SS front/rear lines, 636 shock, Skidmarx BP, Pazzo levers, Rizoma Circuit 851 mirrors, Corbin seat, Grip warmers, Dual headlight mod, BT014's, and mostly blacked out.


    Check out our website The Brake's Site

  10. #10
    Newbie Murshaz's Avatar
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    What Is the Kawasaki z750r 2011. Fork oil capacity

  11. #11
    Up-And Comer PerryG's Avatar
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    When changing fork oil: right fork = 400ml. 13.5 oz. left fork = 410 ml. 13.9 oz. If they're completely disassembled: right fork = 469 + or - 4ml. 15.9 + or - 0.135 oz. left fork = 485 + or - 4ml. 16.4 + or - 0.135 oz. that's info from the 07>12 manual I don't know if the 750r has different forks from the standard model though, there's a link in a recent post for free manual downloads in the general discussion section, you should find it and get a manual for your bike. I got several manuals about a week or so ago from that source (z1000 03>06, z1000 07>09, z750 07>12, and z800 13) and it's well worth having them in my opinion even though I own a older bike and some of them don't pertain to mine I can still offer advice to people like you that need it
    Last edited by PerryG; 06-23-16 at 11:45 AM. Reason: additional information added
    2007 Z750s, 10 zx6 rear shock/linkage, 10 zx6 forks/brakes, HEL front/rear brake lines, Dynojet pcv 17-050, 08 Z1000 clutch and cover, Parts Unlimited 16 tooth front, Supersprox stealth 46 tooth rear sprockets with 114 link RK chain, heated grips (unsure of the manufacturer), bar risers from twisted throttle, 11 ninja 1000 mirrors, Acumen gear indicator, MRA touring windscreen, Corbin gunfighter seat.

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