You'll have no issues with blasting carb cleaner all over the Mikuni - it'll do it some good. And a shot of WD spray on linkages/moving parts. Sometimes it's enough to get it behaving itself. If you have a suspicion that the jets are clogged and you want to test that theory, you can do a 'purge'. Pull the air filter off, start the engine and then cup your hands over the throats of the carb (not enough to stall it, just enough for it to go mental and pull heaps of fuel up into the throats in one shot). This will normally force any fine debris that might be in the jets out and down the throats.

Another test for carb health is the accelerator enrichment jet test. This one is easy but you may need a good light source just in case.- filter off, engine off and hold the choke open with a finger or something that won't damage it. Give the throttle linkage a quick turn and you should both see and hear a squirt of fuel into the primary throat. If you don't get the stream of fuel, the accelerator pump diaphragm is kaput (if you see a 'sort' of spray of fuel instead of a stream either the jet is partially blocked or the diaphragm is stretched). This jet adds a shot of fuel when you first hit the throttle. If the engine is a little hesitant from closed throttle that would indicate there's a problem with it.

p.s. 'HD' = 'Heavy Duty'. Condensation from the exhaust = healthy engine. Man, you write up some long posts lol