Previously I wrote after rebuilding my carbs and have since fixed the
problem of slow return to idle. I adjusted the bypass valve springs with
nearly full tension but that didn't seem to help. It turns out I must have
bent the new throttle shaft when peening the butterfly plate screws so
that the throttle would not close sufficiently to get enough vacuum for
the ignition retard unit. A few taps in the opposite direction on the
shafts got it purring again so I went for a test drive. Now my problem is
when I idle waiting to make a left turn then accelerate quickly the
engine bogs down, that is, now power for a few seconds -very dangerous. It
seems like it's starved for fuel although I guess it's possible that it's
flooding the carb. Right turns are OK and so are other quick maneuvers or
slow start on a left turn or left turns without idling for a few moments.
It didn't do this before the rebuild so I'm guessing this is float height
related. I installed Grose jets as part of the rebuild and double checked
the floats to be .625" as measured from the highest part of the float to
the carb body in the inverted position. I'm wondering if this is the
correct float height when using Grose jets? The mixture seems perhaps a
tad lean although it is difficult for me to discern much change in idle
using the piston lift method. An other suggestions on the cause?
Russ
71 TR6
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