[vincent]

Forgive me for entering your thread but I have a couple questions that if answered might help you as well to get your carbs sorted.
What mainjets would you run in a twin (GB) Stromberg 97 carb set-up? The reason I ask is that I am not getting info anywhere. No response from the makers in GB so far. The engine is running rich and smells badly.
What I did until now:
lowered pressure to 2,5 psi
lowered fuellevel 1/8" below the recommended 1/2" level
fitted smaller mainjets (around 0,040")
adjusted the idle with the mixture screws, have nice and even tick-over and good response to the pedal.

Are the mainjets really responsible over almost the whole rev range? I want to lean the carbs out a bit more and will make a couple smaller jets on my lathe to try.
Thanks for any wisdom you could share with me