i have a 2010 cc with 100 webcam and daul weber 40idf's what jetting should i start with it seems lean on the bottom end and bucks while low speed cruising ,full throttle seems ok

Can you tell us what jets you hace in it including the idle jet Also what is your altitude?

brad

MAIN VENTURI 28,AUX VENTURI 4.50,MAIN JET 115,CORRECTOR JET 200,EMULSION TUBE F11,PUMP EXHAUST .55 ,IDLE JET .50,PUMP JET .50, AND LIVE ON LONG ISLAND

Around what speed does it start to seem to lose power and buck? Is it alright after that speed? The mains seem a little light; you might want to bring those up to 125 or so. The idles... maybe up to .55

Ya, I'd start with those as the main and idle seem small, the air correction seems a little high maybe 180's or 190's. A great person  to talk to would be Art Thraen at A.C.E. in Salt Lake City, he is THE man for Webers and Dellorto's his e-mail is, acevw at aol.com. It will also be very beneficial to know what heads, valve sizes and exhaust you are running.

brad