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Thanks Chris,This is actually the post that triggered my question initially... The post clearly debates about whether the measurement should be from the lip or from the gasket surface but the below text between the pictures seems to indicate the measurement should be from the valve in open position ''so the valve pin tip is just barely touching the float tang''. Doing the work on the spot with the carb mounted is not easy as you would not see when the tip is barely touching the float tang and contrary to the description, in my carbs it does not seem that I have any spring on the valve (it looks like it is gravity). I would be interested to know if the 750K1 should have a spring in the float valve. That may explain why it looses rev as I wait at red light.Wrt the approach I have taken and which I am sharing with the forum to get some feedback, I am now pushing the float at the highest point so when the valve is in close position I make sure I still have some little gap between the float and the top of the carb (i.e. the float does not bang onto the top of the carb which of course would prevent full closure of the valve). I may have a level a bit higher but I think as long as it is not over the gasket (which I will notice as it will leak from here). The assumption I am making is that high level (but no leak) is not affecting the carburation as what is moving the full up into the jets is the suction pressure and the diameter of the jets (i.e. it does not depend on how much of the jets are immerged into the fuel)... Any further experience to share on that one?Wrt to Dennis post and table, do you know what means 4 for the needle jet? Is it a length, diameter or just the level where the pin should be attached at the top?Best,Marc