sorry, i wasn’t clear. dellorto has a carburetor called si, which makes it confusing when asking about it because of the vespa si. from what i can tell, they were used on large bodied vespa scooters. they are down draught rather than pulling air from the side. i have to make a custom intake for my motor and i was thinking about maybe using a 20mm dellorto si.
i was just wondering if any of you knew anything about them. i would hate to have to go to a scooter forum to ask about them.. yuck.

nah, this is si;
[url]http://www.germanscooterwiki.de/index.php?title=Vergaser_Dell’orto_SI_Tuning[/url]
they appear to be super tunable, but rather large and bulky.. hmm.

i was considering it, but it’s too large and bulky. 20mm would have been perfect, and a down draft carb would have been sweet too, but it’s just too overly large