Checking The Carburetor - Yamaha MX250 Service Manual

DISASSEMBLING THE CARBURETOR
a
a

CHECKING THE CARBURETOR

1.
Measure:
• Float height "a"
Out of specification  Replace.
TIP
• Lift up the float so that the tip of the float valve lightly
contacts the float arm, and then measure the float height
"a".
• Do not adjust the float height.
Float height:
13.8 mm (0.54 in)
2.
Check:
• Jets
• Carburetor body
Clogged  Apply compressed air to clean the jet.
3.
Check:
• Valve seat
Wear/damage  Replace.
Dirt  Clean.
a. Wear at groove
b
b. Dirt
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