Hi Richard, your problem sounds like fuel starvation, besides the parcialy
blocked
fuel tank vent already mentioned, if you are using the factory rubber hoses
you may have a restricion on a tight radius , this could worsen at alt./low
temp.,
on four cylinder motorcycle engines, cracks or air leaks at the rubber
sockets connecting the outlet of the carberetors to the
inlet manifolds would CAUSE the RPM to INCREASE or still rev for
a few seconds after the throttle was retarded - the result of
uncontrolled air being sucked in to the chamber.
steve vestui #573
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