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DT125R FORUM

About to perform a fork oil change (not Dt125)

Scheduled Pinned Locked Moved Suspension
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #1

    Not sure if I should put this thread here or on off topic.

    Anyway I'm about to change the fork oil on my CB600F and had a look in the manual. I have no clue what I'm looking at. I want to know how much oil I'll have to add once drained. Here's the picture from the manual.

    http://imgur.com/a/Enhixxp

    I have one of those fancy fork oil tools when you have a ring attached to a tube and a syringe.

    NINJAN 1 Reply Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Irongamer727 on last edited by
    #2

    @Irongamer727 Does the manual have a quantities section? It's normally after the torque settings or in the frequent maintenance section's.

    SEDUCED BY THE DARK SIDE!!!

    Irongamer727I 1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    replied to NINJA on last edited by
    #3

    @NINJA yeah that's what the photo shows?

    1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #4

    It says fluid level 102 (4.0) and I have no clue what it means

    NINJAN 1 Reply Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Irongamer727 on last edited by
    #5

    @Irongamer727 I'm guessing that's 102ml or 4oz???

    SEDUCED BY THE DARK SIDE!!!

    Irongamer727I 1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    replied to NINJA on last edited by
    #6

    @NINJA isn't that extremely little?

    NINJAN 1 Reply Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Irongamer727 on last edited by
    #7

    @Irongamer727 Well maybe, looking at it again it might be 102mm or 4 inches? Are there any markings on the forks, either internally or externally? Or maybe it's from the top of the stanchion? My suggestion would be too measure down to the old fluid in millimeters before you tip it out AND tip it into a measuring jug when you go to empty the old oil out, so you have a record of what's in there now. And those two tests will give you an indication of what's required for refilling. 😉

    SEDUCED BY THE DARK SIDE!!!

    Irongamer727I 1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    replied to NINJA on last edited by
    #8

    @NINJA Found simular information on a forum. How do I need to hold the fork? Put it in a vice with it just sitting?

    NINJAN MiniaM 2 Replies Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Irongamer727 on last edited by
    #9

    @Irongamer727 Subscribe to MC Garage, he has endless vids with tips and tricks!!! 😉

    https://www.youtube.com/watch?v=k884DfM2LsU&t=89s

    SEDUCED BY THE DARK SIDE!!!

    1 Reply Last reply
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  • MiniaM Offline
    MiniaM Offline
    Minia
    replied to Irongamer727 on last edited by Minia
    #10

    @Irongamer727 said in About to perform a fork oil change (not Dt125):

    @NINJA Found simular information on a forum. How do I need to hold the fork? Put it in a vice with it just sitting?

    Yup, soft jaws or a rag and just sit in in the vice and crack the nut and let the old stuff pour out.

    Owned: Yamaha PW50 - Yamaha PW80 - Yamaha RT100 - Yamaha DT125R Black, 2000
    Own: Yamaha DT125R Blue 2002, GasGas 250 Pampera 2001, XT 125 1982, Benelli BN302 2015, Yamaha WR250 1992

    1 Reply Last reply
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  • J Offline
    J Offline
    Jens Eskildsen
    wrote on last edited by Jens Eskildsen
    #11

    Its easier to uninstall the cap when the forks are still mounted. Make sure to loosen the pinchbolts in the upper tripleclamb first.

    And yes, the 102 sounds like 102mm from the top of the compressed fork (without spring installed) to the oil.

    1 Reply Last reply
    1
  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #12

    Easiest way is to pour the oil into a measuring jug and see how much came out.

    Always Originate, Never Pirate!

    Irongamer727I 1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    replied to Calum on last edited by
    #13

    @Calum though you never know if someone else has filled the wrong amount of oil previously.

    CalumC 1 Reply Last reply
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  • CalumC Offline
    CalumC Offline
    Calum
    replied to Irongamer727 on last edited by
    #14

    @Irongamer727 Be alreet. I'm assuming you've been riding the bike and it's not been a problem

    Always Originate, Never Pirate!

    Irongamer727I 1 Reply Last reply
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    replied to Calum on last edited by
    #15

    @Calum yeah I guess. Probably going ride the bike pretty hard with stupid wheelies during the summer. Do you want just slightly more oil then? Or just the specified level?

    NINJAN 1 Reply Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Irongamer727 on last edited by
    #16

    @Irongamer727 I would stick with the specified amount, if you want the forks to be a bit stiffer, then just use thicker oil like 15-20 grade.

    SEDUCED BY THE DARK SIDE!!!

    CalumC 1 Reply Last reply
    0
  • CalumC Offline
    CalumC Offline
    Calum
    replied to NINJA on last edited by
    #17

    @NINJA Did we discuss this on another thread??? And thicker oil doesn't affect stiffness. I distinctly remember @Jens-Eskildsen Saying something. Or someone like that.

    I think, if you want stiffer suspension, then you need to change the springs.

    Always Originate, Never Pirate!

    NINJAN MiniaM 2 Replies Last reply
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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Calum on last edited by
    #18

    @Calum Probably we go around in circles a lot on this forum!!! :grinning_face_with_smiling_eyes: :smiling_face_with_open_mouth_closed_eyes: :smiling_face_with_open_mouth_cold_sweat: :face_with_tears_of_joy: 🤣

    SEDUCED BY THE DARK SIDE!!!

    CalumC 1 Reply Last reply
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  • CalumC Offline
    CalumC Offline
    Calum
    replied to NINJA on last edited by
    #19

    @NINJA I can't remember.

    Genuinely, as bad as this might sound, sometimes I actually struggle to recognise dreams from real life.

    I've sat there at times thinking of something as if it actually happened. Only to remember it was a dream. Mental mate.

    Always Originate, Never Pirate!

    NINJAN 1 Reply Last reply
    1
  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Calum on last edited by NINJA
    #20

    @Calum You gotta stay off them drugs dude, I keep telling ya that there no good for ya!!! :grinning_face_with_smiling_eyes: :smiling_face_with_open_mouth_closed_eyes: :smiling_face_with_open_mouth_cold_sweat: :face_with_tears_of_joy: 🤣

    But back on topic; I believe that the thicker oil slows the compression down, as it is harder to compress through the valves? Which in turn makes the forks slightly stiffer? But I may be wrong? And you are correct - Ultimately stiffer or progressive springs are the sure way to stiffen or upgrade their damping qualities. 😉

    SEDUCED BY THE DARK SIDE!!!

    1 Reply Last reply
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