Yamaha YFM90RA Model Vehicle User Manual


 
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CARB
CARBURETOR
EBS00146
DISASSEMBLING THE CARBURETOR
TIP
Before disassembling the carburetor, make
sure to note the number of times the pilot
screw is turned out from the seated position to
its set position.
float tang
EAS00485
CHECKING THE CARBURETOR
1. Check:
carburetor body
float chamber
Cracks/damage
Replace.
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.
*****************************************************
float chamber body
Dirt
Clean.
float chamber rubber gasket
Cracks/damage/wear
Replace.
2. Check:
float
Damage
Replace.
3. Check:
needle valve
Damage/obstruction/wear
Replace the
needle valve.
New
New