8 - 24
–
+
ELEC
CHARGING SYSTEM
EBS01066
NO
YES
EBS01100
YES
NO
EBS01059
YES
NO
3. Charging voltage
• Connect the engine tachometer to the
spark plug lead.
• Connect the pocket tester (DC 20 V) to the
battery as shown.
Positive tester probe
→
positive battery terminal
Negative tester probe
→
negative battery terminal
• Start the engine and let it run at approxi-
mately 5,000 r/min.
• Measure the charging voltage.
Charging voltage
14 V at 5,000 r/min
NOTE:
_
Make sure the battery is fully charged.
• Is the charging voltage within specifica-
tion?
The charging circuit
is OK.
4. Charging coil resistance
• Disconnect the C.D.I. magneto coupler
from the wire harness.
• Connect the pocket tester (
Ω
×
1) to the
charging coils.
Positive tester probe
→
white terminal
1
Negative tester probe
→
black terminal
2
• Measure the charging coil resistance.
Charging coil resistance
0.72 ~ 1.08
Ω
at 20 °C (68 °F)
(between white and black)
Replace the rectifier/
regulator.
Replace the pickup
coil/stator assembly.
5. Wiring
• Check the entire charging system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
• Is the charging system’s wiring properly
connected and without defects?
The charging system
circuit is OK.
Properly connect or
repair the charging
system’s wiring.
W
Y
/
R B
Sb
2
1
Summary of Contents for 5YF2-AE1
Page 1: ...YFM50S5YF2 AE1 SERVICE MANUAL ...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1 ...
Page 11: ...GEN INFO ...
Page 20: ...SPEC 2 ...
Page 22: ...SPEC ...
Page 44: ...2 22 SPEC OIL FLOW DIAGRAMS 1 Oil pump 2 Oil strainer ...
Page 53: ...CHK ADJ 3 ...
Page 55: ...CHK ADJ ...
Page 94: ...ENG 4 ...
Page 163: ...CARB 5 ...
Page 165: ...CARB ...
Page 172: ...DRIV 6 ...
Page 174: ...DRIV ...
Page 188: ......
Page 189: ...CHAS 7 ...
Page 220: ...ELEC 8 ...
Page 222: ... ELEC ...
Page 250: ......
Page 251: ...TRBL SHTG 9 ...
Page 253: ...TRBL SHTG ...
Page 259: ......
Page 260: ......
Page 261: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...