Question about 2005 Honda CB 750

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My 1982 honda CB750 wont run worth anything

I have a 1982 Honda CB750C that I bought a while ago. it was a mess, but have been rebuilding it. It's not my first rebuild, but I am having troubles getting it to run.
I seem to have a problem with the carbs I have taken them off and cleaned them all the jets and needle jets the works I also replaced the fuel lines between the carbs. After installing them on the bike I can't get it run right at all. It runs weird, backfiring sometimes and then not stating at all others. I can tell that sometimes I'm only running on three cylinders. I have tried adjusting the pilot screws to a neutral spec ( from manual) but that didn't seem to do anything.
I got nothing left and my car just died so I'd like another form of transport. any ideas what this may be?

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  • Carl Holland Jun 17, 2009

    I have done all but check the vale clearance do you really think that alone would do that?



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I guess you will have to synchronize the carbs.
Check the float levels too in all the carbs.
Check the valve clearance.
Check the carburator intake mounting rubbers for leaks.
Hope this helps!

Posted on Jun 16, 2009

  • Murtaza Akberali  Versi
    Murtaza Akberali Versi Jun 17, 2009

    yes it would ...plz send me yr email addy and i will post you the full litreature with regards to tune up and valve clearance and carbs doesn't fit in here .

    My email is



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I have 1982 honda cb70ci have cleaned the carbes and replaced the rubber intakes and nomber three cylinder cuts in and out i can run with the choke on and runs better any body have any sugestions email me

Posted on Mar 13, 2011


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Posted on Jan 02, 2017

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SOURCE: can't get my CB750to run right

You MUST synchronize the carburetors.
It is a task that involves some special tools (carb synchronizer)
Take a look on this forums:

Posted on Dec 02, 2009

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