I have no idea about Suzuki carbs. Only the bastards that come stock on 360s.
The only reason for checking both carbs individually is setting up A/F mix at idle. (for fastest idle speed) So you know both carbs are performing at their peak. Basically making the most power along w best fuel economy. Without going too lean. Air cooled engines require a bit richer mix, the richness helps to keep the engine from overheating during extended idling periods. Stuck at railroad crossings etc...
I found on my bike 12.8 to 1 gives me the best performance at idle.
So, I shoot for 12.8 as the minimum throughout the rpm range while cruising. I would like to see mid 13's to 1 on WOT. But cant hit that due to limitations of needle size availability. And I dont have the proper equipment to make my own needles. Otherwise I would try.
If I do jet her to accelerate leaner. I find she occasionally wants to die during deceleration from higher rpm to a complete stop.
You will find, when rolling off throttle this closes the butterflies and she cant get any fuel through high rpm jets, making it crazy lean. Mine gets upwards of a 21 to 1 mix.
thus if I could make a leaner needle for WOT I could install richer low rpm jetting and she would be able to recover quicker.
This is what causes the exhaust "popping" during decel. Its a lean condition.
AND, you would be a very lucky dude if your carbs were able to simply match A/F mix adjustment and have them both running the same mix at idle. They are crazy touchy adjustments on my bike. As little as a 16th of a turn can be enough to make a big difference between set up properly or not. I have a sickness, a lot of guys dont need that type of accuracy to be perfectly happy w a decent running machine.
As a lot of guys know its hard to keep a 360 running period.
You may find your A/F idle mix adjusters land in different spots. (number of turns in or out) as long as both are giving the max idle speed. It dont matter if they match turns. Its performance your looking for. And a difference may be that the PO had tuned one in too hard, messing up the seat a bit. Therefore it would allow for more or less air or fuel at the same # of turns as the other carb.
At this time I have no idea the number of turns my A/F mix adj needles are set. I just know they are both operating at perfect 12.8 to 1 mix.
I hope this helps a bit and keep me posted on your results.