Resurrecting a 79 CB750F SS

Discussion in 'Some Assembly Required' started by everready, Nov 3, 2017.

  1. everready

    everready Stuck in Ohio....Ugh!!!

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    Waxed paper. I would have never thought of that.
    #41
  2. everready

    everready Stuck in Ohio....Ugh!!!

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    The endoscope arrived today. It's a pretty cool tool to have. These two images of the inside of the cylinder head concern me. You can see the top of the piston and the side wall of the cylinder. In the first picture the piston in near the top of the stroke.
    What are those ridges and the brass colored blob in the first picture and the brown area on the second? Is the brown spot from the valve hitting the piston?
    2017-11-12-17-06-30[1].jpg 2017-11-12-17-08-58[1].jpg
    #42
  3. scot_douglas

    scot_douglas Dirt Harley Lovin'

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    Brown area on the second photo just looks like carbon flaked off the piston top. No worries IMO.
    #43
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  4. H96669

    H96669 A proud pragmatist.

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    Brown/tan carbon?Normal when the mixture is right.

    May be more behind the exhaust valves?Normal.Look in the exhaust ports?

    LED lights on borescopes/endoscopes will give it a golden shine.
    #44
  5. everready

    everready Stuck in Ohio....Ugh!!!

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    I'll see if the mirror attachment will work to get a picture of the exhaust ports.
    #45
  6. H96669

    H96669 A proud pragmatist.

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    Pull the pipes off.I can bet you'll find/see more brown carbon.

    As opposed to what we saw in my friend's CB750F SS.That one needed a rebuild.I just couldn't follow him from the burned oil smell.

    Tip?Do not charge the battery connected to the bike.May melt the potting on the ignition spark modules.
    #46
  7. everready

    everready Stuck in Ohio....Ugh!!!

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    Darn. I wish I had thought of that. I just put the exhaust back on yesterday!
    Now I'm waiting on valve cover seals. After those arrive and are installed, I'm going to try to fire the bike up.
    #47
  8. everready

    everready Stuck in Ohio....Ugh!!!

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    Well the new master cylinder arrived today. I was half way done installing it and noticed this:
    IMG_20171113_162755664[1].jpg
    What is that metal tab at the bottom, on top of the port?

    Al
    #48
  9. baloneyskin daddy

    baloneyskin daddy bikaholic

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    It covers the return hole so it doesn't shoot the fluid all over the place when you release the lever.
    #49
  10. everready

    everready Stuck in Ohio....Ugh!!!

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    Thanks! I sure does look wonky though. If it was pressed in squarely I don't think I would have questioned it.
    So it's a permanent part? Seems like it would need more a permanent attachment instead of just a pressure insertion.
    #50
  11. VX Rider

    VX Rider Long timer

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    Yup...it belongs There
    #51
  12. everready

    everready Stuck in Ohio....Ugh!!!

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    Even with a trickle charger?
    #52