float adjustment question

[Gottaride]

If float height needs adjustment what's the correlation between fuel level adjustment and actual float manipulation i.e. if a bowl fuel level is say 1mm too high is there a measurable change to make to the float tang. Maybe it's a feel thing??

[Steve in Sunny Fla]

It can't be a mathematical formula because the spring tensions vary. Steve

[Gottaride]

Never thought of that. I was hopeing that loosely speaking a change of measured float height might relate to a corresponding change in bowl fuel level. Guess it's trial and error time.

[mdr]

The adjustment at the tang is too small to easily measure.  Bend it to move the float height the amount and direction you want and measure at the float.  There might be a little difference between that change the the bowl level, but it's probably closer than you'll be able to measure reliably. 

I measure it with the carb body horizontal, intake up.  That is float hanging down, pushing on the needle valve.  The float pushes a little on the needle just to get it seated.  You're not trying to measure the exact float height - just the change in height you're trying to get.  Seating the needle gives you a reasonably repeatable measurement.  Make sense?

[Gottaride]

Well I'm happy to report that all four fuel heights are within .5 mm of each other 1mm above the bowl seam. Thank you so much SISF et al for the excellent previous posts which made it relatively easy. If did take up much of my weekend but it was enjoyable. Using preset vernier calipers to precisely set the float heights was the trick. Murphs' float needles were a bit shorter than the ones that were in there when I bought the bike.
OK now to read up on and get those carbs installed. The road calls. Thanks all

[Gottaride]

MDR yup that makes sense. What I was attempting to request was how much of a change in float height relates to a change in fuel level. My bad. At first reading of the Kawi manual relating to float height adjustment I didn't quite get it. The lightbulb went on once I held the float up for measurement in the same orientation as is shown in the manual. I really took my time setting those tangs to get the floats as close as possible to 18mm. Probably lucky that floats and new float needles happened to all behave equally.

[mdr]

I think that unless there's something wrong with one of the components, setting the float height accurately will get you well within the spec'd levels.  I do like to improve on that a little since I believe if it's not spot on, everything else is a bandaid trying to cover the problem.

Helping a guy years ago one of the carbs was off after adjusting the float.  There was what looked like a gnat inside it??  Probably just a piece of plastic left from molding since the floats were intact.  Traded the float for a spare and it was spot on.

Glad it worked out for you!