Shdwdrgn post=927688 userid=41747Think the carbs are ready to test, but when I went to check the (dry) float heights, they're supposed to be at 18.6mm, however every one of them was actually about 5mm higher than that. I have had a constant issue with fuel flooding into the air intake chamber and suspect this could be a cause? However when I first built the bike I did in fact have a rig on the workbench and took the time to adjust the floats using a clear tube from the drain nipple.
I can't find the old coffee can I had rigged as a temporary gas reservoir, so I'm getting a small fuel tank ordered off Amazon that has the same 1/4" connector on it, hopefully will arrive tomorrow. Then I can see where the fuel actually sits (and confirm all of the valves are still working correctly).
That sounds like the tiny spring loaded pins in the float needles are stuck in the depressed position. Confirm that the needle pins are free to move before proceeding with clear tube adjustment.
That said, we don't pay much attention to float height measured on a scale. Those crude old floats with flexible metal frames don't have the consistency of stiff, modern floats that are relatively quite precise by comparison. +/- a couple mm at the dry float bulb should be well within in range of clear tube fine tuning. "
...supposed to be at 18.6mm, ..." Trying to split into tenths of a mm seems futile. The differences in stationary fuel level will be insignificant between say, 18.5mm and 18.6mm dry float height. Fuel is constantly moving around in the bowls when being ridden, so a rough average is the best that can be expected.
Aftermarket float needles and needle seats can have a surprisingly large effect on fuel level too.
No one has mentioned choke plungers yet. Plungers leaking when closed will contribute to rich running when when fuel level is correct.
Vintage carbs offer many lessons for the vintage bike enthusiast. Patience and tolerance of frustration have been two of the most important for us.
We documented our development over the past few years of a process that eases setting wet fuel height. It's a variation of clear tube fuel level tuning that makes fuel level easy to visualize and adjust and, adds safety by using a less-volatile gasoline substitute when working in an indoor shop. It's a fairly long thread. Something within may be of help:
www.kzrider.com/forum/3-carburetor/61368...n-setting-fuel-level
Good Ridin'
slmjim & Z1BEBE
