2. Increase the engine speed from minimum idle to 3000 rpm several times, then return the engine to normal idle (minimum idle speed mode).
3. After the fuel level has stabilized, make sure that the fuel level line is in the middle of the sight glass of the floor chamber.
Adjusting the fuel level in the float chamber
4. If the specified condition is not met (the level line is not in the middle of the sight glass), then adjust the level by very slowly turning the adjustment screw "A".
Note: Do not turn the adjusting screw more than ⅛ of a turn within 15 seconds.
5. After adjustment, fix (seal) the adjusting screw with paint.
[Information obtained from this source hondabook.ru]