Question about 1975 Honda Cb 400 F

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My '74 550 four wont start.

My honda 550 four shut down on my while i was on the highway. Cant restart it, lights down turn on, no nuetral light or anything. Cant kick over. Dont think its the battery (I bypassed it with the charger, still nothing) Fues wasnt blown. Where should i go from here? Thanks

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  • andrewnapoli May 29, 2009

    i solved my own problem. after various other things, i checked the ignition switch, and the soddering had come apart on the hot wire, cuasing it to shut off. It was a weird problem, but it turned out to be something simple. Thanks knight007 for the respond.

  • Murtaza Akberali  Versi
    Murtaza Akberali Versi May 11, 2010

    Maybe the engine has siezed! Did it die down slowly means rolled to a complete stop or did the rear wheel lock?



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Hey, sure sounds like a battery problem to me!!

I would try jump starting from a good battery (......say the one in the wife's Subaru) and if all works OK, just replace your bike battery.

These things are under a lot of stress on cold startup, and once they are gone...they're gone for good!

Once you have all up and running again, check the battery voltage with a voltmeter.

In engine-off position your battery should register about 12-13 volts. With engine running, 14-15 volts is usually delivered.

If voltmeter registers less than 12 volts with engine running, I would be looking at a faulty voltage regulator, or faulty AC generator output. You may have to seek the assistance of an Auto Electrician or a trusted motorcycle repair shop.

Good luck, mate.

Posted on May 29, 2009


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