check engine YAMAHA WR 250F 2007 Owner's Guide

YAMAHA WR 250F 2007 Owner's Guide WR 250F 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52333/w960_52333-0.png YAMAHA WR 250F 2007 Owner's Guide

Page 826 of 912

YAMAHA WR 250F 2007 Owners Guide 7 - 5
–+ELECIGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to ignition system failure

Page 832 of 912

YAMAHA WR 250F 2007 Owners Guide 7 - 11
–+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 870 of 912

YAMAHA WR 250F 2007 Owners Guide 7 - 49
–+ELECCHARGING SYSTEM
EC624000COUPLERS AND LEADS 
CONNECTION INSPECTION
1. Check:
•Couplers and leads connec-
tion
Rust/dust/looseness/short-cir-
cuit 
→ Repair or replace.
CHARGING VOLTA

Page 878 of 912

YAMAHA WR 250F 2007 Owners Guide 7 - 57
–+ELECTHROTTLE POSITION SENSOR SYSTEM
HANDLING NOTE
CAUTION:
Do not loosen the screw (throttle
position sensor) 1
 except when
changing the throttle position sen-
sor due to failure because i
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