carburator/choke/idle question

Discussion in 'Motorbike Technical Discussion' started by Rob Kleinschmidt, Apr 14, 2004.

  1. Take a CV carbed engine that's already warmed up to operating

    Very slowly start to apply a little bit of choke.


    Should you get some initial surging and a small increase in
    RPMs or should the RPMS immediately drop off as the mixture
    gets richer ?

    I'm inclined to believe you should see some initial surging
    and a slight increase in RPMs before it starts to slow down,
    but I've heard both answers offered.
    Rob Kleinschmidt, Apr 14, 2004
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  2. Many CV carbs have a low speed adjustment where rich/lean is set by
    turning a screw.

    So the question is:

    At a best adjustment of idle mixture, when you slowly apply choke
    should you get a little initial speedup or should it slow immediately
    as the choke begins to enrichen the mixture ?
    Rob Kleinschmidt, Apr 15, 2004
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