Damaged cam chain slots cb350k1
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  1. #1
    muz
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    Damaged cam chain slots cb350k1

    Hi all. I am working on the top end of a 350
    The cam chain had been shaking around that much the cam guide pins created a 10 mm oval hole from a 6mm pin. Bottom pin missing Wheel guide rubbers gone
    Thinking of options bog it. Weld it. Or cut sleeves to go over pins bringing it up to 10 mm
    Getting new cam chain and tensioner parts
    Just not sure what to do about missing metal

  2. #2
    muz
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    Not pretty
    Attached Thumbnails Attached Thumbnails Damaged cam chain slots cb350k1-97dfc8b8-0715-4c6f-909f-7f7107319cc7_1559772354521.jpg   Damaged cam chain slots cb350k1-838e6575-e910-43a1-be4e-d5ae1cdaa254_1559772398832.jpg   Damaged cam chain slots cb350k1-e11be75f-9edd-44c1-971f-7b998a40b719_1559772439035.jpg   Damaged cam chain slots cb350k1-ae7ddb3f-f155-4944-ad01-c14f5c851255_1559772472920.jpg  

  3. #3
    Supporting Member Yendor's Avatar
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    You can't really put metal back once it's gone.
    The effort & cost it would take to TIG Weld up and add metal so it could be re-machined to the proper dimensions (If you could find a michinst willing to od it) is way more than it will take to source a used cylinder set.
    1970 CB 350 CAFE - Current Project on the bench,
    1972 CB 350 K4 Red - Now a Happy Rider ! !
    1972 CB 350 K4 Green (My Sons) DONE - YES !,
    1st Bike 1970 SL 350 (Brought home in Parts - Trailer/Trunk/Back Seat - I miss that bike),
    2nd - Bike Kawasaki 750
    3rd - '73 XLCH 1000

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  5. #4
    muz
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    Hi Vendor
    I wish It was just the cylinder set but its both top and bottom so I would need engine case as well
    In Australia parts are scarce
    I can't find anything much at all
    Honda didn't sell that many 350's mainly 750's here
    I dont think epoxy would last but I don't Know
    I was thinking of adding a sleeve top and bottom of guide
    and cutting a slot to suit
    Since its not a moving part
    What do you think of that idea

  6. #5
    Supporting Member Yendor's Avatar
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    I think you have a lot of machine work ahead of you.

    But... with that said I suspect you could machine it out and add some type of sleeve that would make it all fit.
    You just need a skilled machinist who is willing to work with you.

    I would have all the Undamaged Replacements for the Original Parts in hand before I went to talk to my machinist.
    And I would draw up a sketch of what I planned for them to review.
    1970 CB 350 CAFE - Current Project on the bench,
    1972 CB 350 K4 Red - Now a Happy Rider ! !
    1972 CB 350 K4 Green (My Sons) DONE - YES !,
    1st Bike 1970 SL 350 (Brought home in Parts - Trailer/Trunk/Back Seat - I miss that bike),
    2nd - Bike Kawasaki 750
    3rd - '73 XLCH 1000

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