Looks like I got ahead of myself...
Some of this post might belong in a Tech Discussion, but I'm documenting a build/project progress so I posted here.
After work today, I filled the Cabbie with an oil/atf solution to flush out whatever gunk might break free in a good 20-minute run with some high revs. I filled the radiator with water as a flush of the system. It's all part of the start after a long layup procedure. My ears are still ringing and my next door neighbor is definitely hating me today.
The good news, which I want to hang with:
She started right away, and the smoke quickly faded over maybe the first 5 minutes.
While I really didn't care to test rapid throttle response from idle up above what I imagine might be 5k rpm, the efforts I made yielded no real hesitation or stumbles. I do need to adjust valves, tweak the idle screws, sync the carbs, and more.
The fan kicked in somewhere just above the midpoint on the temp gauge, and started pulling the temps down. That seems to be working.
I peeked in at the water pump. It's the original bakelite blade version, but there's no wiggle or wobble. I'll check for a clogged weep hole, but I'm not going to do a preemptive pump replacement if I don't pull the transmission cover for something else.
And the bad news:
Left head has a definite coolant leak out of what seems to be the #2 exhaust. It's pretty bad, and it wasn't happening yesterday when I gave her a test start after installing the carbs. I know I didn't flush the coolant before starting yesterday, but I did pour a bit of water in to top it off. I thought I topped it off, but perhaps not.
Today, with the rad topped off with water, I saw water dripping off the #2 header bolts before I even started the bike.
Here's a video I shot to help me try to pinpoint the leak.
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Avatar is a summer '21 photo of the Blue Phoenix, our Winter '21 GL1100I gone naked.