cm450 carb issues

Discussion in 'Motorbike Technical Discussion' started by novascroller, Apr 7, 2008.

  1. novascroller

    novascroller Guest

    "its an 1984 honda cm450e. it has VB22 carbs (CV) I'm having
    hesitation/stuttering at about 1/4 to 1/2 throttle. the carbs have
    been professionally cleaned and synced. the slides move easily
    in the bore. once past this "stuttering" it runs fine. i just had
    the carbs apart again to doublecheck and couldn't find any dirt in the
    jets. these aren't the original carbs for the bike but every jet
    has been properly sized as per the service manual. not 100% sure of
    the pilot jet as there are no markings on them. how can one tell?
    also,
    the bike is extremely hard to get running well when it gets cold
    outside.
    any info would be appreciated.
     
    novascroller, Apr 7, 2008
    #1

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  2. novascroller

    Who Me? Guest

    Guess: vacuum leak.......running lean. Probably "needs" a stock air filter
    to get the right mixture.
     
    Who Me?, Apr 8, 2008
    #2

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  3. novascroller

    . Guest

    I suspect that your idle mixture is too rich.
     
    ., Apr 8, 2008
    #3
  4. novascroller

    novascroller Guest

    air filter is stock.
     
    novascroller, Apr 8, 2008
    #4

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