Cb400t tach drive oil seal replacement
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  1. #1
    Junior Member hondaboy1's Avatar
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    Aug 2014
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    Cb400t tach drive oil seal replacement

    Hi All,
    the tach drive oil seal on my CB400t is leaking so can it be removed without removing RH casing?

  2. #2
    Senior Member dtsmjr8dan's Avatar
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    Yes. Just pick out the old one and slip in the new one.
    1977 CB750 (acquired project)
    1979 CM400T (rider),
    1979 CM400T (resting)
    1980 CM400T (just picked up in pieces)
    1981 CM400T (in surgery receiving transplant)
    1982 CM450 (donor engine for 81)
    1982 CB450 (parts bike)
    1985 VT1100C (rider)

    Past rides: Vincents, Triumph, BSA's, Suzuki's, Twingle, Corgy, others.

    Remember, today is the tomorrow we worried about yesterday.
    My chest fell, but, fortunately, my belt caught it.
    I don't know everything, nor, have I met the one who does.


  3. #3
    Member kcap122's Avatar
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    I did a quick write-up on this for the CB350.
    Tachometer oil seal | CB350 Restore

    Long story short, you should be able to pull the driver off the end of the assembly that interfaces with the camshaft, and the seal will come with it.
    1972 CB350K4

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  5. #4
    Super Moderator longdistancerider's Avatar
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    Quote Originally Posted by kcap122 View Post
    I did a quick write-up on this for the CB350.
    Tachometer oil seal | CB350 Restore

    Long story short, you should be able to pull the driver off the end of the assembly that interfaces with the camshaft, and the seal will come with it.
    These models are driven off the oil pump inside the right case cover
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
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  6. #5
    Junior Member hondaboy1's Avatar
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    Aug 2014
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    I removed the tach cable but can't get the seal out so looks like I will have to remove the Rh crankshaft casing to get it out.

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