Yamaha YBR 125 Service Manual page 141

Loosen the oil drain screw
veral minutes to raise the temperature.
Keep the fuel level dipstick in vertical condition and
make it approach to the engrave line of float chamber.
Measure the fuel level with fuel level dipstick.
Note:
The records of the fuel level dipsiticks of the pipes on
two sides of the carburetor should be equal.
If the fuel level is not correct,adjust it:
Remove the carburetor
Check the valve seat and needle valve
If they are all in good condition,adjust the fuel level by
bending the rear part of the float
Install the carburetor.
Check fuel level again.
5-6
CARB
Carburetor
, run the engine for se-
slightly.
5