CB360 - running! but smoking carbs.
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CB360 - running! but smoking carbs.

This is a discussion on CB360 - running! but smoking carbs. within the Technical forums, part of the Caferacer.net Forums category; So this thing hasn't run in 2+ years and I pulled it out of the barn behind our house to start working on it. So ...

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  1. #1
    Member Cursh's Avatar
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    CB360 - running! but smoking carbs.

    So this thing hasn't run in 2+ years and I pulled it out of the barn behind our house to start working on it.

    So far I have.

    1-cleaned and patched the carbs with gorilla glue
    2-Cleaned and sealed the tank.
    3-pulled the head to repair a cross threaded spark plug
    4-installed new points
    5-installed a new battery.

    As it sits there are a bunch of holes late in the exhaust, but nearly all the smoke is coming from the air boxes and sides of the carburator (there is a brass looking circle above the idle adjustment screw - its coming from there. and everywhere behind it airbox vents - screw holes in the airbox, etc.)

    I would give my self a 4 out of 10 in mechanical aptitude as it relates to combustion engines. (and a 7 out of 10 otherwise)

    I searched but A: I'm practically illiterage so I can't spell carburator and B: I'm pretty terrible at imputing appropriate search terms
    *1975 honda CB360 - Excuse me, English is my second language and I\'ve been drinking.

    I work at STAMP
    my work can be seen here

  2. #2
    Senior Member busapilot's Avatar
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    Keyster carb rebuild kit - http://www.siriusconinc.com/search_r...&search=search

    Remove air box until the issue is found and fixed. Provide picture - can be worth a 1000 misspelled words.

    Check the rubber carb mount insulators for cracks. - http://www.bikebandit.com/houseofmot...9224#sch400006

    Any residual oil left on any hot parts (valve head?) will smoke until burned off. I imagine gorilla glue would smoke up like a factory too. Try J-B Weld instead.
    Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles. It makes me take another look. - S.M.

  3. #3
    Senior Member muskies666's Avatar
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    Did you adjust valves and set the timing properly when you put the head back on?

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  5. #4
    Senior Member OC Steve's Avatar
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    quote:Originally posted by Cursh

    patched the carbs with gorilla glue
    I don't know if this has anything to do with the "carbs smoking" problem, but it's funny.

  6. #5
    Senior Member kerosene's Avatar
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    the gorilla glue part might need a little clarification - as in what did you glue?
    -

  7. #6
    Senior Member crazypj's Avatar
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    Usually carb diaphragms.
    If they are split get some JBM replacements, about $45.00 for pair including shipping
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

  8. #7
    Member Cursh's Avatar
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    quote:Originally posted by OC Steve

    quote:Originally posted by Cursh

    patched the carbs with gorilla glue
    I don't know if this has anything to do with the "carbs smoking" problem, but it's funny.
    does this downgrade me to a 3 out of 10 with combustion engines?

    I patched a few pin holes in the Diaphragms. It appeared that I wasn't the first to do it. I'll replace them with new when I have the $ laying around. I'm sure there are other things more pressing as well. My forks need attention (suggested in my last post) and I have a few wiring bugs (headlight doesn't work). Until then I'll stick to pedal bikes.

    @busapilot - would you like a picture of it smoking? I'm not sure what I should photograph for you, but I would be happy to. I have a few hours to kill this afternoon and could get into it a little bit more.

    As far as setting the valves and timing. I *"think"* the timing is set right, but I really haven't enough experience to know what I'm looking for. My test light doesn't light AT ALL when I do what the Clymer instructs to set timing. (it lights elsewhere)

    As far as the valves, I can't remember what my hang up was the last time I was looking to adjust them . . . or it was just very easy/ they appeared to be properly set . . . either way, I will start there this afternoon.

    Thanks for all of your help so far.

    -Ben
    *1975 honda CB360 - Excuse me, English is my second language and I\'ve been drinking.

    I work at STAMP
    my work can be seen here

  9. #8
    Senior Member busapilot's Avatar
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    quote:Originally posted by Cursh
    would you like a picture of it smoking?
    I'm pretty new to this too, but I've been fixing my CB weekly since I bought it two years ago. I'm visual and seeing it smoke (at idle and under throttle) can narrow down some of the culprits.
    Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles. It makes me take another look. - S.M.

  10. #9
    Senior Member crazypj's Avatar
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    Here's link. I couldn't find it last time I was looking
    I changed a pair, they seem to be pretty good and it's easy fix.
    I'm going to get a couple as I have 4 360's
    http://jbmindustries.com/Keihin_diaphragm.html
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

  11. #10
    Senior Member busapilot's Avatar
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    @PJ - THAT'S AWESOME!

    Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles. It makes me take another look. - S.M.

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