Did you replace the vacuum lines and caps? Install new intake O-rings? It may be lean due to vacuum leaks, and not the carbs. Also make sure the tubes from the air cleaner to the carbs are on, and ALL the clamps are snug. ( there are three for each carb). You may have to have the carbs balanced, especially if the pilots were so out of whack. Probably been sucking air somewhere since the PO had the bike. A can of starter fluid spray around the intakes and vacuum lines will help find a leak, with the bike running. Carefully!!!
