Glenn
The different jetting for the centre carb is theoretically correct but there are also differences in the pilot air jets which change how the pilot circuit interacts with the main jet circuit. The Air correction jet and pilot jet is also different.
I suspect the change was simple rationalisation as there is sufficient adjustment in the carbs for most purposes once the basic settings are right.
The carbs for the D/D2 (also 110) engine were actually different in that they have accelerator pumps - normal 405 carbs don't
401 - main 3x 110 air corr 230 pilot air 3x 150 pilot 50
403 - main 115/120/115 air corr 190 pilot air 120/100/120 pilot 45 (also for 404 and early 405)
Late 405 - main 3x 115 air corr 200 pilot air 3x 100 pilot 45
100C engines - main 3x 130 air corr 230 pilot air 100 pilot 50 (sports engines)
Your current set up is highly idiosyncratic - see my comments on your other post
I'd suggest you read the solex carb book for a detailed description of how they work and how the jets interact
Julian
|