John
With mine the piston was sticking a little, it seemed when the piston
was lifted and dropped it didn't make the needed "clink", the jet
assembly was a little center. All it took to correct was to loosen off
the assembly and the piston cover, then with a small (5-6oz) plastic
tipped hammer tap around the piston dome. Then lifted the piston and
let it drop a couple of times, this centered everything up perfect and
tightened everything down again.
Before this I was getting the same as you, now the idle returns
correctly. Just something to try, it took someone showing me about
20minutes to do this and now if I touch the carbs it is the first
procedure to do.
Hope it helps
David Templeton
'59 Triumph TR3a
'74 Triumph Spitfire
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