Yamaha LIT-11616-12-01 Motorcycle User Manual


 
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ELEC
IGNITION SYSTEM
EB802010
TROUBLESHOOTING
IF THE IGNITION SYSTEM FAILS TO OPERATE (NO SPARK OR INTERMITTENT SPARK):
Procedure
Check:
1.Spark plugs
2.Ignition spark gap
3.Spark plug cap resistance
4.Ignition coil resistance
5.Engine stop switch
6.Main switch
7.Pickup coil resistance
8.Source coil resistance
9.Wiring connection
(the entire ignition system)
NOTE:
Remove the following part(s) before trou-
bleshooting:
1)Seat
2)Front carrier
3)Front fender
Use the following special tool(s) for trou-
bleshooting.
Dynamic spark tester:
P/N. YM-34487
Ignition checker:
P/N. 90890-06754
Pocket tester:
P/N. YU-03112, 90890-03112
1.Spark plug
Check the spark plug condition.
Check the spark plug type.
Check the spark plug gap.
Refer to “SPARK PLUG INSPECTION” in
CHAPTER 3.
Standard spark plug:
DR7EA
CORRECT
Spark plug gap:
0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
INCORRECT
Repair or replace the spark plug.
for USA/CDN
2.Ignition spark gap
Disconnect the spark plug cap from the
spark plug.
Connect the dynamic spark tester 1 as
shown.
2 Spark plug cap
3 Spark plug
Turn the main switch to “ON”.
Check the ignition spark gap.
Crank the engine by pushing the starter
switch, and increase the spark gap until
a misfiring occurs.
Minimum spark gap:
6.0 mm (0.24 in)
MEETS SPECIFICATION
The ignition system is not faulty.
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