Troubleshooting - Yamaha SR125 1997 Service Manual

Yamaha sr125'97 3mw-ae1 service manual
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SR802010

TROUBLESHOOTING

Procedure
Check:
1. Spark plug
2. Ignition spark gap
3. Spark plug cap resistance
4. Ignition coil
5. Pickup coil resistance
NOTE:
Remove the following parts before trouble-
shooting.
1) Side cover (left and right)
2) Seat
3) Fuel tank
4) Headlight unit
YP*****
1. Spark plug
Check the spark plug condition.
Check the spark plug type.
Check the spark plug gap.
Refer to "SPARK PLUG INSPECTION" sec-
tion in CHAPTER 3.
Spark plug gap:
0.6
0.7 mm
IF THE IGNITION SYSTEM FAILS TO OPERATE.
(NO SPARK OR INTERMITTENT SPARK)
MEETS
SPECIFICATION
:
IGNITION SYSTEM
6. Source coil resistance
7. Main switch
8. Engine stop switch
9. Sidestand switch
10. Wiring connection
(entire ignition system)
Use the special tools specified in the trouble
shooting section.
Ignition checker:
90890-06754
Pocket tester:
90890-03112
Standard spark plug:
DR8EA/NGK
OUT OF SPECIFICATION
Repair or replace the spark plug
7-5
ELEC

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