"You can do the best to tune y
"You can do the best to tune your carbs so that they perform just about the same but no two will act alike. Too many variables can come into play, the needle valves, the valve seats, the float adjustments, linkage and choke adjustments can all alter the idle and running RPM. The only sync you need is a gauge to help you adjust the throttle on the twins to compensate for differences, but as for tuning them to full sync., I agree with the other guys here...find a truthful mechanic. Twofold, a rebuild carburator is only as good as the rebuilder and the tools he has to work with. You can pick a mechanic who works out of his garage with one set of Craftsman tools or purchase a well re-built carb (or have yours rebuilt) from a reputable source who has up-to-date equipment to fine tune the carburator, individually, as needed. Next engine....go for MPI's."