1970 CL175 leak at right cylinder cover tachometer
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  1. #1
    Member jayache80's Avatar
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    1970 CL175 leak at right cylinder cover tachometer

    Hello all,

    As you can see in the pictures below, I have a leak coming from the right cylinder cover that houses the tachometer cable. Does this require a new gasket or oil seal? Or both?

    Thank you






  2. #2
    Member rortiz5's Avatar
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    Have the same issue on my CL175k5. For me it's leaking on the bottom right corner pan screw. I replaced the gasket twice and even bought a like new condition housing of ebay and it's still leaking the same. I'm not really sure where to go from here.

  3. #3
    Member mikeonabike's Avatar
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    There is a small seal in the tacho drive, Have a look on CMSL Honda Cb175k4 Super Sport England Right Cylinder Head Side Cover - schematic partsfiche

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  5. #4
    Senior Member Gixxer-18's Avatar
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    +1 on Tacho drive Oil seal. The gasket could leak, but you'd see the oil outside the Tacho box not inside. To remove the old seal; screw a self tapper into the seal and pull it out. Use a socket to drift the new one back in, and protect it by using the old one as a buffer. Pull it out again with the self tapper.
    HTH
    Nigel.
    2002 GSXR1000
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    1979 T140E Bonneville
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    1972 CB500/Four K1
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    1972 A100 Suzuki
    1957 T100

  6. #5
    Senior Member Simo's Avatar
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    As above the oiling path to the cam/ cam journals /head would mean oil outside the journal if the Gasket or Gasket faces were bad.
    The only way to get oil in the area shown is via the Tach drive and the oil seal is the most likely culprit

  7. #6
    Senior Member Richard_Pitman's Avatar
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    Memory may be failing me here, but I thought the seal simply pulled out along with the tacho drive mechanism, gripping the flats on the drive pin with pliers ?
    1970 Honda CB175K4
    1972 Honda CL175K7
    1999 Honda CB600 Hornet
    1970 - 1972 Random heap of CB/CL/SL 175 parts, slowly being reassembled ..

  8. #7
    Senior Member ajk4send's Avatar
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    Although in my CB125 (1972) construction for this parts is almost the same. I had the same problem, but it was due to leak from tacho gear. I have replaced part no 11 from partsfiche drawing. It is available in Honda service in Europe (part no in Honda documentation has a reference for new replacement number).
    Tacho gear is lubricated by motor oil.

  9. #8
    Senior Member Richard_Pitman's Avatar
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    Just for reference, the oil seal IS simply removed by pulling out the whole drive gear assembly using fine nosed pliers.

    Don't misplace the small washer on the far end, easy to leave this behind then find that the gear doesn't go back into position when refitting. Put the washer on the end of the shaft to avoid this happening.

    A suitably sized thin walled socket will push the new seal home into its housing. I assembled the seal onto the shaft first, then refitted as a complete assembly, using plenty of oil on it.

    1970 CL175 leak at right cylinder cover tachometer-tcs1.jpg

    1970 CL175 leak at right cylinder cover tachometer-tcs2.jpg

    1970 CL175 leak at right cylinder cover tachometer-tcs3.jpg
    1970 Honda CB175K4
    1972 Honda CL175K7
    1999 Honda CB600 Hornet
    1970 - 1972 Random heap of CB/CL/SL 175 parts, slowly being reassembled ..

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