1966 CB450 KO Wiring Problem
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  1. #1
    Senior Member gaillarry's Avatar
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    1966 CB450 KO Wiring Problem

    After 6 months away on a job site finally get back to working on the bike. Hooking up the wiring harness and perplexed by the group of wires shown in the pic below. There's 4 wires coming from the stator area(right side of pic) and there's 6 wires in harness (left side of pic)

    Looks like the stator wires have different colour wraps on them, is this the colour I used to identify the wires?
    and where do I find the other 2 wires to put into the harness connection?



    1972 CB350

  2. #2
    Sensei 66Sprint's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    Coming out of alternator area you should have 4 wires:
    Pink (to harness pink which is rectifier pink)
    Yellow (to harness yellow which goes to rectifier AND regulator AND forwards in the harness)
    White (to harness white which ultimately connects to that "forwards" yellow when the lights are on)
    Green with red stripe (neutral switch) to green/red in harness

    ASSUMING the other two of the 6 wires are green and black, they would go to the appropriate {same} color at the regulator)

    I can't verify the current color "wraps' as they aren't factory and could be wrong....
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

  3. #3
    Senior Member tbpmusic's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    Does a 4-speed have a regulator??
    Bill Lane
    Honda Twins Founding Member

    No advice, just info

    '75 CB200T, '71 CB450 K4 Half-Breed, '72 CL350 (Sold), '81 CM200T, '72 C70M
    and a little red Chineeze scooter

    http://www.bikeexif.com/honda-cb450-restoration

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  5. #4
    Sensei 66Sprint's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    AFAIK, (and remember), the early ones did NOT.....The 1968 ones did...(of course, the K1 was in production in 68 also, and it had a regulator).... Perhaps our UK 4-speed experts will enlighten us...But then again, US models differed a tad.....

    This "up to '69" drawing shows one.....but it also shows pink and yellow wires, (and two meters)....I remember the 4-speeds having a brown wire and a white(?) wire....... This might just be for the K1...
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

  6. #5
    Senior Member gaillarry's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    Quote Originally Posted by tbpmusic
    Does a 4-speed have a regulator??
    Looks like a zenor diode from my old Triumph T140.

    1972 CB350

  7. #6
    Sensei 66Sprint's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    That part is the rectifier....
    Does anyone have a 4-speed wiring schematic they can/will post?
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

  8. #7
    Super Moderator nigelrharris03's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    These are often knackered by anno domimi (not sure if I spelt that correctly) I have changed mine for a new reg rectfier. This was a good move. Most often a new standard rectifier will work as well, and new silicon rectifiers have better charecteristics electronically.
    Nige

    CB450K0 Bomber 1967
    CB650Z 1978

  9. #8
    Super Moderator nigelrharris03's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    This is mine its set as My machine is with no indicators. I hope that it helps.

    [attachment=0:3d6jz86f]CB-CL450(4speed)a.jpg[/attachment:3d6jz86f]
    Attached Thumbnails Attached Thumbnails 1966 CB450 KO Wiring Problem-cb-cl450-4speed-.jpg   1966 CB450 KO Wiring Problem-cb-cl450-4speed-.jpg  
    Nige

    CB450K0 Bomber 1967
    CB650Z 1978

  10. #9
    Senior Member tbpmusic's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    Quote Originally Posted by 66Sprint
    AFAIK, (and remember), the early ones did NOT.....The 1968 ones did...(of course, the K1 was in production in 68 also, and it had a regulator).... Perhaps our UK 4-speed experts will enlighten us...But then again, US models differed a tad.....
    I don't know anything except the US models, really - I never personally saw a US 4-speed with a regulator.
    And I've still never managed to come up with a 4-speed manual, sorry.......
    Bill Lane
    Honda Twins Founding Member

    No advice, just info

    '75 CB200T, '71 CB450 K4 Half-Breed, '72 CL350 (Sold), '81 CM200T, '72 C70M
    and a little red Chineeze scooter

    http://www.bikeexif.com/honda-cb450-restoration

  11. #10
    Senior Member gaillarry's Avatar
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    Re: 1966 CB450 KO Wiring Problem

    Quote Originally Posted by nigelrharris03
    This is mine its set as My machine is with no indicators. I hope that it helps.

    [attachment=0:3mpks8b4]CB-CL450(4speed)a.jpg[/attachment:3mpks8b4]
    Thanks, yours is the diagram I'm using. The p.o. of the bike painted all the wiring black, so its a pain stripping back the ends to see the color of the wires. I'll keep plugging away at it and no doubt I'll be back with more questions.
    1972 CB350

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