My how to video on replacing fork seals in 1985 CB450 and similar
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  1. #1
    Junior Member beaterhawk's Avatar
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    My how to video on replacing fork seals in 1985 CB450 and similar

    If I left anything out or there is a better way, let me know so we all do it right.



    Tires and a new paint job and we're on the road again!

  2. #2
    Member mikemo's Avatar
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    Great video. Thanks for sharing.

    I would add two things:
    1) Before you start, slowly press the schrader valve at the fork top to remove any air pressure.
    2) The correct oil amount for the CB450SC is 6.26 ounces +/- 0.1 ounces

    You should also show how they work when you're done. I've noticed a lot of the instructional youtube videos leave that part out. It is cathartic for the rest of us
    Nice job!
    1982 CB450SC Nighthawk
    2 x 1988 Toyota MR2 Supercharged (one finished, one under reconstruction)
    2018 Honda Civic SI

  3. #3
    Junior Member beaterhawk's Avatar
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    Thanks Mike!

    I totally forgot to release the air, but luckily for me, the seals were so shot there was none left in the system.

    Good looking out on the capacity. I got the correct amount of oil in there and put the correct air pressure in (i misread the manual and originally put 3 psi instead of the 11 (+\- 3) psi it calls for) and MAN is it tight now.

    Here is a link to a before and after:

    https://youtu.be/e7_r9L-gW7k

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  5. #4
    Super Moderator longdistancerider's Avatar
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    1982 CB450SC 6.3-6.5 ounces or 190cc +/- 2.5
    1983 thru 1986 CB450SC 6.16-6.36 ounces or 185cc +/- 2.5
    Fork oil quantity can change by year and model so always consult the FSM for the correct amount

    Now a sticky post for easy finding/viewing
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


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  6. #5
    Member mikemo's Avatar
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    Thanks for the 2nd video. What's interesting to me is that your forks seem way stiffer than mine. I don't think my seals are bad as I don't lose oil or air pressure. However, mine bounce much easier than your "after" video (but not as loose as you "before" video).
    Have you had it out on the road yet? If so, how did the front end feel?

    Thanks
    Mike M.
    1982 CB450SC Nighthawk
    2 x 1988 Toyota MR2 Supercharged (one finished, one under reconstruction)
    2018 Honda Civic SI

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