2003 YAMAHA WR 250F check engine

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Page 800 of 860

YAMAHA WR 250F 2003  Owners Manual 6 - 67
–+ELECLIGHTING SYSTEM
LIGHTING SYSTEM
INSPECTION STEPS
Refer to the following flow chart when inspecting the ignition system for possible problems.
NOTE:Replace the bulb and/or bulb socket.

Page 808 of 860

YAMAHA WR 250F 2003  Owners Manual 7 - 1
TUNSETTING
EC700000
TUNING
EC710000
ENGINE
Carburetor setting
The air/fuel mixture will vary
depending on atmospheric condi-
tions. Therefore, it is necessary to
take into consideration the air

Page 810 of 860

YAMAHA WR 250F 2003  Owners Manual 7 - 3
TUNSETTING
CAUTION:
The carburetor is extremely sen-
sitive to foreign matter (dirt,
sand, water, etc.). During instal-
lation, do not allow foreign mat-
ter to get into the carburetor.
Always

Page 824 of 860

YAMAHA WR 250F 2003  Owners Manual 7 - 17
TUNSETTING
Examples of carburetor setting depending on symptom
This should be taken simply for an example. It is necessary to set the carburetor while checking the operating condi-
tions of the
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