2005 YAMAHA WR 250F stop start

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Page 750 of 864

YAMAHA WR 250F 2005  Owners Manual 6 - 13
–+ELECIGNITION SYSTEM
SPARK GAP TEST
1. Disconnect the ignition coil from
spark plug.
2. Remove the ignition coil cap.
3. Connect the dynamic spark
tester 
1 (ignition checker 
2) as
shown.


Page 751 of 864

YAMAHA WR 250F 2005  Owners Manual 6 - 14
–+ELEC
ZÜNDFUNKENSTRECKE 
KONTROLLIEREN
1. Das Zündkabel von der Zünd-
kerze abziehen.
2. Den Stecker von der Zündspule
abziehen.
3. Den Zündfunkenstrecken-Tester
1 (Zündungstester 
2),

Page 802 of 864

YAMAHA WR 250F 2005  Owners Manual 6 - 65
–+ELECTHROTTLE POSITION SENSOR SYSTEM
8. Tighten:
Screw 
(throttle position sensor) 
1 
9. Stop the engine.
1
THROTTLE POSITION SENSOR 
INPUT VOLTAGE INSPECTION
1. Disconnect the throttle po

Page 814 of 864

YAMAHA WR 250F 2005  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
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