I regret to say that with the stock airbox installed, it wouldn't start at all.

Not a single catch, with starter fluid or anything. Killed the battery after 10-15 different attempts.

https://imgur.com/gallery/3kNCWBH

I broke that. Trying to get the vacuum tube from the petcock on.

that's going to be a problem.

Not starting is not the airbox's fault. I said it before, but I mean it now. Good luck, but I think I am done trying to help. Follow the link in my signature for a walk thru, I don't have anything more to add.

Thanks.

I will read it again.

The 122.5 is a hair lean if you have 40 pilots in. If you have 37.5's its well about 1 size lean.
How in the freeeeking heck does the rebuild kit have 1/2 pre 00 and 1/2 post parts Those 2 carbs dont have a single common part save for an O ring here or there. As usual, Suzuki fixed what wasn't broken except by design, making an even worse broken part and ignored all the broke crap with carbs.

Cool.
Buddha.

Buddha. Put the lunchbox back on. 40 no bleed pilot jets. 150 (small head) mains.

When it was cold, I pulled the choke out and gave it a squirt of starter fluid. Fired right up.
I had to give it 'a blip' to get the rpms over 4K. Then they dropped to 4000 and stayed there. Let it run like that for a minute and then tried playing with it. Lowered the choke to 50% and the rpms dropped fast. Revved the throttle. Sounded good.
Tried to replicate for a video and it won't hold rpm at choke. Started smoking.

It seems like maybe some oil or gas is somehow getting out the exhaust valves.

Here's where I see smoke or oil: https://imgur.com/gallery/dtHRqmT

Once the bike is warm (warm only) I start getting more and more white smoke out the exhaust.

You likely have an overflowing float (white smoke is gas, greyish is water and gas, blue is oil - LOL I know depends on your eyesight) and, put the right large slotted round mikuni mains. ot that its a huge deal at this point but better to eliminate that issue too.

Why starter fluid - wont it start without that ? Then plugged up air and fuel passages and pilot circuit are the culprit.

Choke when cold is normal, full choke till fully warm, I know all that 1/2 choke BS, but really 1/2 or not, till up to temp choke is acceptable.

Next step, smell your white smoke. Put your hand in it. If its gas obviously you'd smell it and it gets your hand nice and ... well combustible, so dont light up a cigarette. Water will smell like nothing, and oil will send you running for cover.

Cool.
Buddha.