82 Maxim Carb Problems?

Discussion in 'Motorbike Technical Discussion' started by Sean, Aug 12, 2005.

  1. Sean

    Sean Guest

    I picked my wife up an old 82’ Yamaha Maxim. It will only idle with
    the choke on, as soon as you kill the choke it dies and as soon as you
    give it any gas it dies. I’m guessing it’s the carbs. I took the air
    filter off and shot some carb cleaner spray up into the 2 intakes with
    it running and managed to get it to rev up a bit but then it started
    shooting this nasty looking brown crap that smells like gas out of the
    hole below and centered between the two intakes when it revs. Is there
    any way to fix this thing without totally taking the carbs off? Any
    suggestions if I do have to take them off? I cleaned out the tank and
    checked the petcock and they’re both clean. It did sit for at least a
    year before I bought it. Also if anyone has a service manual for this
    thing on the computer that I could get off of them I haven’t had time
    to order one yet.
     
    Sean, Aug 12, 2005
    #1
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  2. Congratulations. You are the 50 millionth motorbike rider to post this
    exact same symptom. Your idle jets and idle passages are plugged up
    with gum and varnish.

    It's possible to clean the junk out of your carbs using aerosol carb
    cleaner if you can figure out which hole is the pilot air intake. It's
    probably the small hole on the right as you look down the intake. But
    you can't go squirting a whole lot of carb cleaner down that hole with
    the engine off, the carb cleaner can get into the engine and dilute
    your oil. A little bit at a time with the engine running at a fast idle
    should help. Otherwise, you're going to have to pull the carbs off and
    do a proper job of cleaning them.

    I've probably posted what to do about this problem about 100 times in
    rec.motorcycles.tech. Google up "idle jets" in rec.motorcycles.tech...
     
    krusty kritter, Aug 12, 2005
    #2
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  3. Is there an FAQ for this group? Because this ought to be at the frigging
    top of the list.
     
    The Older Gentleman, Aug 12, 2005
    #3
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