that's kinda correct....
I wrote this explanation in my Concourier article entitled Carbs. it ain't a diet thing
with the carbs in front of you, turn the main idle adjust knob while watching the throttle plates till the screw stop is just touching the stop lug, and then back off another half turn. this insures it has no effect on the individual carbs when adjusting the screws.
they should all be fully closed, and covering all of the holes in the throat behind the air mix needles, if not, adjust each screw untill this occurs
start with the middle screw first, then the 3/4 screw, and finally the 1/2 screw.
now you may begin adjusting them untill all of those butterfly throttle.plates begin to show just the leading edge of the first/front most hole in the throat, you just want it to begin being seen, takes a keen eye... continue untill all 4 look the same.
Now you may twist the idle speed knob untill you see the edge of the plate move them all so you see its.edge at the center of the holes, this is tricky, but if you
do it correctly the reflection of the hole on the plate will make it appear as a circle, not an obround or figure 8 shape. if you need to tweak individual sides at this point to get them alligned, so do so, but they should all alllign if the first step was done right... somtimes it doesn't due to rod flex on the shaft, or wonky springs..... now open the throttle by manually actuating the lever, and let them all slam shut,.repeat this a couple times,.and verify that the leading edge of all throttle plates are.all centered.on that front most hole.... now, don't touch anything..... install the carbs, and procede to using a manual gauge for final synch, but I will tell you this...
on a perfectly cleaned set of carbs, with new air screws and hardware istalled, this bike should start, and idle perfectly... depending on you valve adjusts, and airfilter, you should not have to turn any adjustment screw more than 1/8 turn, and when I say this, when you have a quality synch gage on them, Like a TwinMax set on medium resolution, simply inserting the screwdriver into the screw without any pressure, will show a change...
I've built a lot of Keheins on my bench, and installed them, and never had to tweak a screw more than a "twitch"...
mind you Steve has built a lot more than I have, but I'm sure he knows my secrets as I've freely shared them with him...
the procedure I outlined will insure the bike WILL start, and will amaze you.... it ain't rocket science, its just carbs....