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Thread: Fork Oil.

  1. #1
    Junior Member
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    Fork Oil.

    Hi, new to this forum and the NC700. Been riding KLR's for a while.
    What is the proper fork oil level (cc and distance). Weight of fork oil?
    Thanks
    ja

  2. #2
    Super Moderator Fork Oil. 670cc's Avatar
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    The answers to your questions are found in this nice write up here: Fork oil change
    Last edited by 670cc; 9th January 2019 at 12:29.
    Greg
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    NanCyX . . . . . . . . . . The 250

  3. #3
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    Thank you
    For the reply
    ja

  4. #4
    Senior Member Fork Oil. dduelin's Avatar
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    Short cut - OEM is Honda SS-47 and the level is 104 mm. I would consider Honda SS-8 as well.

    SAE weight is not very precise measurement of flow in light oils used in forks and shocks so it should only be used when comparing "weights" within one brand. One brands 7wt could act "thicker" than another brand of 10wt.
    Dave

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    NC700XD




  5. #5
    Senior Member Fork Oil.
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    Interesting that Racetech's number is so far off. Their web site says to use 120mm. Maybe that's due to different springs, or the emulators, or something.

  6. #6
    Senior Member Fork Oil. dduelin's Avatar
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    Quote Originally Posted by Junkie View Post
    Interesting that Racetech's number is so far off. Their web site says to use 120mm. Maybe that's due to different springs, or the emulators, or something.
    Yes of course it's the changes from stock forks. I'm using Cogent Dynamic cartridge emulators and an oil level of 150 mm.
    Dave

    GL1800
    NC700XD




  7. #7
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    SAE grade means absolutely, positively _nothing_ in fork oil. You must look at the 40C (100F) viscosity in cSt (SUS) to compare fork oils.

  8. #8
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    Fork Oil Viscosity Change Question

    Hey guys, I'm new to the Forum and hope I'm posting this message in the correct place.

    I'd love to know if anyone has had success replacing "just" the fork oil with a different viscosity and achieved a noticeable improvement? I know there's many great threads on major fork mods, but I'd like to start with the easiest and least expensive and see if I'm happy.

    Thanks much!

  9. #9
    Senior Member Fork Oil.
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    With damping rod forks, changing the oil weight generally gains something at the expense of something else.

    If you go thicker you'll have less brake dive, but it'll be harsher over bumps.

  10. #10
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    So would the opposite be true... a thinner viscosity oil providing more brake drive and a smoother suspension response over pumps.

    I definitely won't be experimenting with this. Just curious if anyone has found an oil that they believe works better than the stock oil.

    Thanks!

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