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  1. #1
    CB750 New Member tmccustoms's Avatar
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    New Member from Ohio

    Hi everyone, I thought it would be a good idea to introduce myself before I start posting. I have always liked the look of the CR750 and finally decided to pull the trigger on a CB750 that wasn't a restoration candidate. I have stopped by this site several times while making decisions on whats parts to buy and I figured I should stop creeping.

    The bike title says it is a 72 but the tag on the neck says 71. It was locked up when I purchased it but a whole can of PB blaster and a lot of patience later, it turns freely. I am currently working out the bugs in the electrical to make sure everything is working before I tear it completely apart.

    If I can figure out how to post an image, a picture of my sweet new ride will be below:

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  2. #2
    Moderator dirtdigger's Avatar
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    What do you have planned for the engine?

  3. #3
    CB750 New Member tmccustoms's Avatar
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    I am going to take the top end off and see how it is looking. I hope to just do a minor top end rebuild and repaint. No plans to do any engine modifications yet.

  4. #4
    Moderator dirtdigger's Avatar
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    On engines that had been locked up I hate to see when people dont look in the bottom end. If the cyinders was locked, you know you got moisture in the bottom. After sitting long enough to rust up, think about the fact that you are forcing stuck by turning it over with dry engine bearings...easy to score up the soft bearing material as the oil has long since drained out. Just some things to think about.

  5. #5
    CB750 Guru amc49's Avatar
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    X2. If water just condensed around pistons then the cylinder walls are often junk from the ring rust damage. It may run but not run right.

  6. #6
    CB750 New Member tmccustoms's Avatar
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    Good call, I will do my best to check it out. The bike was full of oil and once it started to turn, it turned pretty well. My fear is the walls like AMC noted. I plan to hone the cylinders if they are in good shape, otherwise new cylinders I guess. Right now I have no spark and there is a bit of barn yard wiring on it but not much.

  7. #7
    CB750 Enthusiast everready's Avatar
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    Are you going to put the original style wheels back on (those came with spoked wheels, right?) and go with the original paint scheme?

  8. #8
    CB750 Enthusiast everready's Avatar
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    Quote Originally Posted by tmccustoms View Post
    Good call, I will do my best to check it out. The bike was full of oil and once it started to turn, it turned pretty well. My fear is the walls like AMC noted. I plan to hone the cylinders if they are in good shape, otherwise new cylinders I guess. Right now I have no spark and there is a bit of barn yard wiring on it but not much.

    Order an endoscope. You can inspect the cylinders without disassembly. I paid $16.00 for mine. It's invaluable!

  9. #9
    CB750 Guru amc49's Avatar
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    That won't show how rusted or stuck any rings are though.

  10. #10
    CB750 Enthusiast everready's Avatar
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    Quote Originally Posted by amc49 View Post
    That won't show how rusted or stuck any rings are though.
    You're right. The endoscope is just a tool to help diagnose the situation. For $16.00 it's a good investment.
    Last edited by everready; 11-17-2017 at 04:52 AM.

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