Given your descrition, the chokes are almost certainly too big. This is
a fairly common problem - people use race setups that they get out of
the book, and those setups are designed for ideal performance at WOT.
That means that they need to flow a lot of air. Flowing a lot of air
means that there's very little vacuum signal at idle.
A TR6 for "road" use probably wants to start out with a 28mm choke.
30mm at the most. I'd check that first. The chokes have the most
effect on drivability of the car.
The unfortunate thing is that chokes are not cheap - testing a
different set will cost a bundle, unless you can find a local shop that
has parts you can "try".
There is, unfortunately, no way to tune Webers long distance. They're
*too* flexible.
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