srsupertrap wrote: Sorry to read the flatslides have the same exact behavior in the milled out Z1 boots, e.g. hanging idle. That cured mine but lets move on.
Nothing's ever easy. Appreciate the help.
I replaced these O-rings when I cleaned and rebuilt my set. Find the tube extending into the carb bowl, then move up and you will see the o-ring.
I've been avoiding taking that apart, specifically cause that gasket is NLA. It's still got the factory tamper-resistant screws in there. Since that o-ring seals the choke, I'd have expected that it would leak gas if it was bad. But you're probably right, I'm at the try-everything point. Hell for all I know, these NLA gaskets could be the leak.
I'm going to go back to my smallest jets (27.5) just as a baseline. Before milling the boots, those gave me the smoothest idle. After running those and actually writing down some notes, I'll get the front plate broken down today and hope I'm not cutting new gaskets by hand. Do you know what size those o-rings are by chance?
I'm also going to re-check the valves now that the bike's been run up to temp a few times.
Also: Needle position shouldn't matter for this specific problem, right? I have these set to the middle.
Edit:
Went ahead and replaced those o-rings. None were bad or even hardened. I'm starting to think that this problem isn't these carbs. Maybe valves, timing advance, dunno anything else that could affect it.
Still need to check the valves again.
Did some color-tuning on this run.
27.5 pilot jets + 1.5 turns out: Idles smoothly, and the idle *slowly* returns if the throttle is very slowly opened.
From 1/2 to 1 turns out, the idle hangs, but with a colortune, the color of the flame is a perfectly "bunsen burner blue"
It turns orange as expected when the throttle opens, but then when the throttle is closed and the RPM is hanging, the colortune shows the same blue from the ~3-5k hang down to normal ~1100 idle. Never turns white, so it's not lean at idle.