stock jets of keihin cv34

karoliens wrote: I took the picture of the floats at rest position:

From what I saw on the internet and manual floats ar not upside down. By the way when bending tang and measuring height should it compress the fuel level valve spring because of the weight or should I put carbs in that position which won't compress but just touches? I read different opinions on the net.

Bend the tang and measure the height in the rest position as shown in your photograph. I'm sure the float weight will compress the spring a little but you should ignore this. Don't touch.

Hi Patton
In his Keihin CV34 carbs which are the same as mine the drain and the overflow are all the one. The drain screw just upens the lower end of the brass overflows tube.

Apologies if I am misunderstanding
I edited your picture to show the effect of bending the tang. You should not need to bend very much. A small bend makes a big difference



You need to change the the float height and make it 4mm lower than it currently is. By doing this, when you reassemble the carbs and put them on the bike the fuel level will be 4mm higher in the bowl and should be 4mm below the carb bowl seam.
Your have measured the current fuel level in the bowl at 8mm below the bowl, body seam. Is it possible that your measurement using the clear tube method is incorrect?

Patton wrote: Clear tube test is supposed to draw fuel from the float bowl drain, and NOT from the overflow circuit.

If not already done, may need to loosen (not remove) the float bowl drain screw while performing the clear tube test. Otherwise, fuel from the bowl nipple is from the overflow circuit (which is incorrect for the clear tube test).

Good Fortune!

What I attempted to suggest is better stated in the manual:







Good Fortune!

Thanks Patton
Those instructions are the clearest and hopefully will help the original poster along with many others.

Hm I will try your suggested methods tomorrow. I don't know how I could lower float height by 4mm because it is already 18.5mm and float is resting against carb body. My thought is that I should increase float height because fuel level was 8mm below matting line.

So finally I measured fuel level correctly. It showed incorrect fuel level earlier because I put fuel tank tap in "ON" position and not "PRI". :blush: So fuel level is 4mm +/-1mm. Is it bad if one carb fuel level is 4mm other is 5mm etc. if it includes within range 4mm +/-1mm?