1978 CB400A Hondamatic No Spark Faulty CDI Conversion - Page 2
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  1. #11
    Senior Member Woodstock's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Quote Originally Posted by longdistancerider
    Quote Originally Posted by Woodstock
    Ive been in contact with them. They asked me for pictures of the connectors on the cdi. I dont quite understand why but I thought well a schematic would probably be more helpful. So I sent them a wiring schematic. They replied that they needed pictures of the connectors. Since I still have the cdi on the bike I did the best i could and sent them pictures of the connectors. I wasnt expecting anything plug and play from them so Im a little confused. I just want them to answer yes or no that thats the model I need and give me a price. Sometimes a company can be overly helpful. That being said they seem like good people.
    The reason for the actual connector pictures and wiring of them is so that they will be able to supply a complete plug-n-play unit where all you have to do is supply a IGN+ power wire. Once they have that they'll get back to you with what they feel is the best unit.
    PM me your email address and I'll send all the pictures I have and you can pick the ones that apply to your bike.
    Do the 400T and 400A have the same CDI? Mine is a Nippondenso 070000-0271.

  2. #12
    Super Moderator longdistancerider's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    No. The A's are a completely different critter. Manuals use a Hitachi unit. That's also why they need as much info as you can give them like the 2 base timing points of 7.5 and 15
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
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  3. #13
    Senior Member Woodstock's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Well some good news.
    Hello,



    You wrote that your bike is CB400A and sent wiring diagram for this bike. On wiring diagram I see that there is some "CHANGING RELAY". There is connect neutral switch, sidestand switch and other. On your photos is unit NipponDenso with label 070000-0271. This unit we know, there is not connection to "CHANGING RELAY".

    I am note that on your wiring diagram is different ignition system than on your photos.



    ???



    Also I see that your ignition unit is incorrectly connected. Connector with yellow and green wire is connected to white and blue wires. This is not right.



    If you want make replacement unit for NipponDenso 070000-0271 - yes we can make it.



    Regards.



    Jiri Krejzl

    IGNITECH
    They want $150 and $48 dhl shipping. Not bad for a tunable cdi.
    If you want one for your cb400a email ignitech@ignitech.cz and tell them you want a cdi replacement for a NipponDenso 070000-0271. Provide them with your address for the invoice.

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  5. #14
    Super Moderator longdistancerider's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Very cool.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
    Road Trip http://www.hondatwins.net/forums/11-...here-i-go.html or "where's Jim now?"
    Member Map http://www.hondatwins.net/forums/dcMembermap.php

  6. #15
    Member argentcorvid's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    any update on this?

  7. #16
    Senior Member Woodstock's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Quote Originally Posted by argentcorvid
    any update on this?
    A couple of people have bought ignitech cdi replacements and are very happy. A couple of us decided to go the EFI route instead.

  8. #17
    Member argentcorvid's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Quote Originally Posted by Woodstock
    Quote Originally Posted by argentcorvid
    any update on this?
    A couple of people have bought ignitech cdi replacements and are very happy. A couple of us decided to go the EFI route instead.
    say what now? I totally missed this.

  9. #18
    Senior Member Woodstock's Avatar
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    Re: 1978 CB400A Hondamatic No Spark Faulty CDI Conversion

    Quote Originally Posted by argentcorvid
    Quote Originally Posted by Woodstock
    Quote Originally Posted by argentcorvid
    any update on this?
    A couple of people have bought ignitech cdi replacements and are very happy. A couple of us decided to go the EFI route instead.
    say what now? I totally missed this.
    I decided to work on an EFI (electronic fuel injection) system instead of using the ignitech cdi. viewtopic.php?f=59&t=17423

  10. #19
    Junior Member Don_T's Avatar
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    Thread bump.

    I am currently working on a CB400A with ignition issues. I get spark but the burn time reading from my spark analyzer is all over the place. I doesn't idle worth crap, and the burn time readings are all off and fluctuate. At certain RPMs it runs fine and the burn times are correct. Someone removed the kickstand switch and plugged the G/W and G/B wires into each other to bypass the kickstand switch. If I unplug these from each other it idles perfectly but runs like crap at the RPM levels that previously ran will. I checked the resistance on the CDI unit as per the Servicwe Manual and the readings were backwards and significantly higher. I am suspecting that the CDI is bad and am interested in the replacement from IGNITECH. I have the Nippondenso 070000-0271 unit. What concerns me is the there IS an change relay and IGNITECH says their unit doesn't have one. Does this replacement work properly with the CDI CB400A and just bypasses the transmission gear indicator?

    Please help. Thank you.

  11. #20
    Super Moderator longdistancerider's Avatar
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    I know it's been done but I don't know the details of how it was accomplished.
    Do you have the A model manual?
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

    SALE IS ACTIVE TILL 200 SHIRTS SOLD T-shirt sales supporting 66Sprint's Land Speed Record Build http://www.hondatwins.net/forums/22-...d-attempt.html

    http://www.hondatwins.net/forums/22-...d-attempt.html and http://www.hondatwins.net/forums/1-p...r-attempt.html
    Road Trip http://www.hondatwins.net/forums/11-...here-i-go.html or "where's Jim now?"
    Member Map http://www.hondatwins.net/forums/dcMembermap.php

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