starting up an engine CM400 - Page 2
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  1. #11
    Senior Member doode's Avatar
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    You using new plugs and caps and trimmed ignition cable?
    You check your coils with a multimeter to verify they're good?
    Can you post a photo of your electrical connections currently hooked up?

  2. #12
    Member arieon69's Avatar
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    I will post a picture soon. Presently the only thing I have hooked up is the CDI and coils. The B/W wire is disconnected. Pictures do help. So I'll definatedly upload them. I have a video link of what it sounds like when I try to start it.. Also, to check with a multimeter will it still give an accurate read having only these things hooked up? I was wanting to check the readings on the wires using the CDI Magician method, however not sure that I can. I have 3 CDI's and I couldn't think that they're all bad. It just doesn't seem right.

    https://goo.gl/photos/HgzUrWHwkUgk8jQF7
    Last edited by arieon69; 12-19-2016 at 09:16 AM.

  3. #13
    Senior Member dtsmjr8dan's Avatar
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    Be thankful it didn't start yet. Put some exhaust pipes on it or you'll burn valves. Cam cover bolt is not a good place for a ground cable...put a bolt through the crankcase mounting holes. You should use the CDI magician's method for testing the stator/pulse generator readings. Don't run the starter for long attempts at starting, or you'll burn the starter. Let us know what readings you have on the 'magician's' tests.
    1979 CM400T (rider),
    1981 CM400T (in surgery awaiting transplant)
    1982 CM450 (parts bike)
    1982 CB450 (parts bike)
    Past rides: Vincents, Triumph, BSA's, Suzuki's, Twingle, Corgy, others.
    Remember, today is the tomorrow we worried about yesterday.
    My chest fell, but, fortunately, my belt caught it.
    I don't know everything, nor, have I met the one who does.

    T-shirt sales supporting 66Sprint's LSR Build http://www.hondatwins.net/forums/22-...d-attempt.html

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  5. #14
    Member arieon69's Avatar
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    Snapped a few pics... I was in the process of putting the carbs on, but it's cold as hell (16 degrees) and my finger tips couldn't take it. My garage isn't finished yet. But as I stated, only my CDI is connected. I grounded the battery on the valve cover.

    [IMG]126665[/IMG]
    [IMG]126673[/IMG]
    [IMG]126681[/IMG]
    [IMG]126689[/IMG]

    My dog was also trying to be very active in my build.
    Attached Images Attached Images
    Last edited by arieon69; 12-19-2016 at 11:49 AM.

  6. #15
    Senior Member dtsmjr8dan's Avatar
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    Carbs are on upside down. CDI and coil are on wrong side. You still need exhaust pipes to protect the exhaust valves. An engine mounting bolt would be a better ground. If the wiring off the CDI and coil are not connected to the stator and pulse generator, you will not get any spark.
    Last edited by dtsmjr8dan; 12-19-2016 at 12:08 PM.
    1979 CM400T (rider),
    1981 CM400T (in surgery awaiting transplant)
    1982 CM450 (parts bike)
    1982 CB450 (parts bike)
    Past rides: Vincents, Triumph, BSA's, Suzuki's, Twingle, Corgy, others.
    Remember, today is the tomorrow we worried about yesterday.
    My chest fell, but, fortunately, my belt caught it.
    I don't know everything, nor, have I met the one who does.

    T-shirt sales supporting 66Sprint's LSR Build http://www.hondatwins.net/forums/22-...d-attempt.html

  7. #16
    Member arieon69's Avatar
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    Quote Originally Posted by dtsmjr8dan View Post
    Carbs are on upside down. CDI and coil are on wrong side. You still need exhaust pipes to protect the exhaust valves. An engine mounting bolt would be a better ground. If the wiring off the CDI and coil are not connected to the stator and pulse generator, you will not get any spark.
    If you notice part of the carbs are off, I noticed it about halfway installed like "wait... that's not right, I don't think." The coil was already attached like that, so I left it. Will switch them around though. The only thing I attached was the CDI but it is connected at the alternator and reg/rec. Kinda difficult putting together a bike that came apart. But I'm determined to get it together.

  8. #17
    Super Moderator J-T's Avatar
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    Not sure if we asked before but do you have the factory service manual? A parts fiche can also be useful for showing what goes where.
    JT
    81 CM400T Under re-construction
    82 GL500

  9. #18
    Member arieon69's Avatar
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    I do have a Honda shop manual that I downloaded from this site I think. I've been watching some tear downs and also looking through the book. So I've been getting a good idea as far as wire routing. Need to find exhaust bolts, I'm short two. Might as well find some stainless ones.

  10. #19
    Senior Member dtsmjr8dan's Avatar
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    If you're talking about the exhaust studs that go into the head, they are 6mm x65mm.
    1979 CM400T (rider),
    1981 CM400T (in surgery awaiting transplant)
    1982 CM450 (parts bike)
    1982 CB450 (parts bike)
    Past rides: Vincents, Triumph, BSA's, Suzuki's, Twingle, Corgy, others.
    Remember, today is the tomorrow we worried about yesterday.
    My chest fell, but, fortunately, my belt caught it.
    I don't know everything, nor, have I met the one who does.

    T-shirt sales supporting 66Sprint's LSR Build http://www.hondatwins.net/forums/22-...d-attempt.html

  11. #20
    Member arieon69's Avatar
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    Quote Originally Posted by dtsmjr8dan View Post
    If you're talking about the exhaust studs that go into the head, they are 6mm x65mm.
    I am thank you! I didn't know what size they were.

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