Honda CB-1 - 400. What is the float height on a honda cb-1 please??

The factory specified float level (fuel level) for the Honda CB-1 (CB400F, 1989-1991) is 8 mm (0.31 in) measured from the float bowl gasket surface to the fuel level line, or a float height specification typically aligned around 7 mm to 9 mm depending on the specific Keihin carburetor bank variant. [1, 2, 3] (links)
How to Measure and Adjust

• Position: Hold the carburetor body at an angle so the float tang just touches the tip of the float valve needle without compressing the internal spring. [1]


• Measurement: Measure the distance from the float bowl mating surface (gasket surface, with gasket removed) to the highest/outer edge of the float. []


• Adjustment: Bend the small metal tang on the float very gently with a small screwdriver or pliers if the measurement is outside the target range. [1]


• Validation: Re-check using a clear plastic tube on the float bowl drain to confirm the actual liquid fuel level sits 8 mm below the carb body mating edge. [1, 2]
A clear visual guide on how to measure float height and check fuel levels accurately:
7m
How-To: Adjust FLOAT Height & Clear Tube Method
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