1982 CB450 Won't Start Anymore - Page 2
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Thread: 1982 CB450 Won't Start Anymore

  1. #11
    Super Moderator longdistancerider's Avatar
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    The neutral switch isn't making a good ground, not sure if that's the problem. You have a voltage drop of over 1V when there should be hardly any.
    Connect a ground wire from the solenoid Green directly to the negative battery terminal and see what happens, BE SURE that the bike is in neutral.
    You can check with the VOM for voltage output from the solenoid to the ground by connecting the VOM to the Green solenoid output and the negative battery terminal.
    Your clutch safety switch is bad, you can bypass it by connecting the 2 wires together BUT you have to always be sure not to accidentally start it in gear.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration

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  2. #12
    Junior Member KiloJoule's Avatar
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    Connecting the ground from the battery directly to the solenoid worked! So if I understand, this means there's a problem with my ground somewhere? Is it likely a light somewhere could have a bad connection? Is there a good way to check for that systematically?

  3. #13
    Super Moderator longdistancerider's Avatar
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    Yes, this means that the solenoid is not seeing ground through either the clutch safety switch or the neutral safety switch. So:
    Put the bike in gear and pull the clutch lever, see if it starts. Starts mean that portion is good and the problem is in the wiring/connections/switch of the neutral safety. No start? Jump the 2 small connectors at the clutch lever and try again. Starts means that switch is bad. No start means the problem is upstream towards the solenoid.
    Check that the Silicon diode is in place under the left side cover, Check the power will go through it in one direction only. Both directions means it's bad and no power thru means it's bad. It's a little small black usually box with 2 wires attached.
    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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  5. #14
    Junior Member KiloJoule's Avatar
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    Found the problem! Jumping the two small clutch lever connectors lets me start it now! Thanks for the help!

  6. #15
    Super Moderator longdistancerider's Avatar
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    Good, now always be sure to pull the clutch lever or be absolutely sure it's in neutral before starting. They will fire up hot easily and drive away from you, don't ask how I know
    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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