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Thread: Fork seals

  1. #1
    Baby Twin
    Join Date
    Jul 2015
    Location
    Worcestershire
    Posts
    15

    Fork seals

    Go to fit new fork seals
    2 questions
    Which way round does seal go
    What volume of oil does it need
    Cheers

  2. #2
    Baby Twin
    Join Date
    Jun 2014
    Location
    Finland
    Posts
    41
    If you have Íhlins fork, the oil volume is 470...500 ml/fork; 5W grade.

    It is difficult to explain the seal orientation in words - install the new ones as the old were.

    https://www.youtube.com/watch?v=cX7mASNcDVg

  3. #3
    Baby Twin
    Join Date
    Jul 2015
    Location
    Worcestershire
    Posts
    15
    Not ohlins
    Standard forks
    Had seal replaced a month ago before i got bike
    And leaking allready just wondered if they put it in
    Wrong way round
    Open end of seal towards bottom of fork

  4. #4
    Retired
    Join Date
    Oct 2010
    Posts
    502
    Seal lip will always be lowest on a usd fork and open end with seal spring on the internal side of the fork. You will need to source or make a seal driver to re seat a new seal properly if it's a showa fork.
    Stock oil is 10w but set oil amount via air gap not volume. You almost never get all of the residual oil out of the cartridge etc so there could be 10cc hidden around the internals and you will overfill as a result if you use volume alone.

    Air gap is usually 80 -120mm ish depending on your weight and riding. The bigger the air gap the slower the rise in the damping rate as the fork compresses so a lighter/gentle rider will want less oil and vice versa. If your unsure go in the middle of the range.

  5. #5
    Baby Twin
    Join Date
    Jul 2015
    Location
    Worcestershire
    Posts
    15
    Great
    One more is measurement taken with spring and internals fitted

  6. #6
    Retired
    Join Date
    Oct 2010
    Posts
    502
    internals fitted, fork compressed.

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