Yamaha TZ250M1 Owner's Service Manual page 110

CARBURETOR AND REED VALVE
EC464600
Float
1. Inspect:
EC464701
Reed valve
a
1. Measure:
a
4-12
• Hold the fuel level gauge vertically next to
the float chamber mating surface.
• Measure the fuel level with the fuel level
gauge.
NOTE:
Keep the carburetor and fuel level gauge
vertically when measuring the fuel level.
• If the fuel level is not within specification,
inspect the valve seat and needle valve.
• If either is worn, replace them both.
• If both are fine, adjust the fuel level by
bending the float tab b on the float.
• Recheck the fuel level.
• Float 1
Damage ≥ Replace.
• Reed valve bending a
Out of specification ≥ Replace.
Reed valve bending limit:
0.2 mm (0.008 in)
• Valve stopper height b
Out of specification ≥ Adjust stopper/Replace
valve stopper.
Valve stopper height:
6.5~6.9 mm (0.256~0.272 in)
ENG