Hi Neil
Sounds like you are getting close. I Got the carbs we are using
on my girlfriends GL off Ebay. I think they came from a Fiat or Alfa
or something, but they are Dellorto DRLA40S's and I eventually did get to about the same jetting on our 1835 T1 that you have on your bigger engine. 180 air correctors, #2 emulsion tubes, 150 mains, 060 idles, screws our 3/4 turn, 32mm vents.
Trial and error is really the only way to get it right, but I hope this post might be usefull as a reference.
Yetibone
P.S.
Check and make sure that those little washers, and O-rings are on the ends of the mixture screws. If not, there is a chance aitr can be sucked in past the threads, and cause a lean misfire right off idle.
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