Checking The Carburetor - Yamaha YBR125ED 2005 Service Manual

CARBURETOR
EAS00485

CHECKING THE CARBURETOR

1. Check:
• carburetor body
• float chamber
• jet housing
Cracks/damage → Replace.
2. Check:
• fuel passages
Obstruction → Clean.
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a. Wash the carburetor in a petroleum-based
solvent. Do not use any caustic carburetor
cleaning solution.
b. Blow out all of the passages and jets with
compressed air.
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3. Check:
• float chamber body
Dirt → Clean.
4. Check:
• float chamber rubber gasket
Cracks/damage/wear → Replace.
5. Check:
• float
Damage → Replace.
6. Check:
• needle valve 1
• needle valve seat 2
Damage/obstruction/wear → Replace the
needle valve, needle valve seat and O-ring
as a set.
7. Check:
• O-ring 3
Damage/wear → Replace the needle valve,
needle valve seat and O-ring as a set.
8. Check:
• throttle valve
Damage/scratches/wear→ Replace.
9. Check:
• throttle valve spring
Cracks/damage → Replace.
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CARB
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