Wow, thank you so much guys for all this info and updates. I've gotta say that I find all this fascinating.
My bikes running really good considering, and I was planning on just riding out the rest of the season. But here I am fiddling, tweaking, experimenting. Look what you guys have started!
Hey, I think this is great.
Here is a pic today of where my settings are at. Floats are set at 24mm.
I was pretty anal about that height setting this time. Checked, checked, rechecked and then checked again with a digital caliper. Made sure all twists were out. Interesting how my 24mm setting fuel level is lower than 5twins.
I wonder:
1) My settings really weren’t on 24mm. Possible I guess.
2) I had just installed new OEM Mikuni float valves. Maybe 5twins were older valves and valve return spring tension was different?
3) A difference in our floats lead to different levels when in use.
4) Or. After I finished up there was something nagging at me that I had read earlier today:
Using a larger 5-6mm (1/4") tubing is simply easier, eliminates the capillary accounting, and gives you a direct reading. My 2-cents...
Huh. When I was done and putting everything away I checked the tubing I was using and sure enough it was 3/16" ID and not 1/4".
Maybe..... this difference in smaller tubing ID had an effect on the level reading.
I checked the parts boxes and still have some 1/4" tygon fuel line. Will try this tomorrow and see if there is any difference. I would have thought that a liquid will seek it's level no matter the size of container/tubing but who knows.
Easy to try and see.
Thanks again guys. Veeerrryyy interesting!