Troubleshooting - Yamaha YSR50T Service Manual

IGNITION AND STARTING SYSTEM
I
ELEC
1
E l
I
I I
I
TROUBLESHOOTING
IF IGNITION SYSTEM SHOULD BECOME INOPERATIVE (NO SPARK OR INTERMllTENT
SPARK).
Procedure (1)
Check;
1. Spark plug
2.
lgnition spark gap
3. Ignition circuit
4. Main switch
5. Spark plug cap resistance
6. "ENGINE STOP" switch
Ignition coil resistance
Pick-up coil resistance
Source coil resistance
Wiring connection
(Entire ignition system)
NOTE:
*Remove the following parts before troubleshooting.
1) Lower cowling
2)
Upper cowling
3) Seat
4) Side cover
5) Fuel tank
*Use the following special tool(s) in this troubleshooting.
Pocket Tester:
Y U-03112
1. Spark plug
*Check the spark plug condition.
*Check the spark plug type.
*Check the spark plug gap.
Refer to the "SPARK PLUG INSPECTION"
section in the CHAPTER 3.
1
INCORRECT
Standard Spark Plug:
B7HS (N.G.K.), B8HS (N.G.K.)
Spark Plug Gap:
0.5-0.6
mm
(0.20-0.24 in)
Repair or replace spark plug.
U
CORRECT