Hi there,

Basic settings for webber twin 40 dcoe

Main jets 130-140
Air correctors 190-200
F11 emulsion tubes
35 accelerator pump jets
34mm chokes
4.5 auxiliary venturis
40 f9 idel jets
Float level shut off 7.5mm
Full droop float setting 15mm

I would service these first, kits are cheap
If you don't know much about these carb's i would get someone that does
There hard to set up and get right

Hope this helps

Alan