Yamaha VMX12 2001 Service Manual page 266

CARBURETORS
EAS00486
CHECKING THE CARBURETORS
The following procedure applies to all of the
carburetors.
1. Check:
• carburetor body
• float chamber
• jet housing
Cracks/damage → Replace.
2. Check:
• fuel passages
Obstruction → Clean.
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.
3. Check:
• float chamber body
Dirt → Clean.
4. Check:
• float chamber rubber gasket 1
Cracks/damage/wear → Replace.
5. Check:
• float
Damage → Replace.
6. Check:
• needle valve 1
Damage/obstruction/wear → Replace the
needle valve.
7. Check:
• piston valve 1
Damage/scratches/wear→ Replace.
• piston valve diaphragm 2
Cracks/tears → Replace.
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CARB