Question about 1975 Honda Cb 400 F

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72 cb 450 wont stay running new battery plugs points look to be firing good

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  • bazzz7071
    bazzz7071 May 13, 2010

    hello what is the recent history of the bike

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Try pulling on choke alittel to see if it does run...if so its starving of fuel.

If it dies quicker its running too rich / ??flooding.

Posted on May 13, 2010

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as you didn't mention any details of this saw , im gonna suspect its at least 10+ years old , and I can say if its still got its original points and condenser , even its orig coil that's where id start looking for a problem ! , I do assume you have already tried a new plug as they do short out sometime and wont fire even in air !! , these are great saws they have been making this design since 1968 (I have a 72 that still runs !!!) and they still make them ,although they renamed it a farm boss nowadays , its still the same design , although they don't come with points any more no there all electronic now

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Hi, Buzaa and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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1 Answer

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1 Answer

Wont start


need more info. sat for the winter? fires but wont stay running? its such a vague question, noone will answer it if ya dont put some time into writing a good question ya ****!

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