What I was suggesting is called "bench syncing" a carb assembly. There are really two purposes. FIRST and most important is to set the slide heights of all slides in the middle of the adjustment range of the idle adjustment screw. The second and also important reason for doing a bench sync is to make sure all slides are roughly the same height when you initally try and start the bike. If the slides are too far out relative to each other, it can actually mess up the first reason if you have to crank one of the adjusters a whole bunch... When I started my business I soon found this is a critical step before attempting to tune carbs. Without a bench sync (and service fuel level setting), I couldn't get many sets accurately sync'd and the idle set. Most service manuals explain how to do it but they seem to stress putting a piece of wire under the slides... but they do tell you to screw down the idle screw a bit and leave a certain space between the bellcrank and brackeet stop... seems about 3/8" is normal. The wires are essentially a time waster. It is just as accurate to put a small space (about 1/32"?) of space under each slide. Then shut the slides with the idle screw... they should all shut simultaneously and open simulataneously... I find the wires a distraction. If you use some of the larger objects, as has been suggested on this board in the past, the slides will be set the same but outside the range where the idle screw can open and close the slides effectively. If you like to use "objects" and find the little wire suggestion tedious, try using large paper clips. Bend them in an L shape so they don't fall through. The paper clip diameter is about as large as you can go without messing up the range of the idle screw.
