Yamaha Scorpio Service Manual page 235

3.Charging voltage
Connect the Indicative tachometer to the
G
spark plug lead.
Connect the pocket tester (DC 20 V) to the
G
battery.
Tester (+) lead → Battery (+) terminal 1
Tester (–) lead → Battery (–) terminal 2
Start the engine.
G
Measure the charging voltage.
G
Charging voltage:
12 V or more at 3,000 r/min
14.5 V or less at 8,000 r/min
4.Charging coil resistance
Disconnect the CDI magneto coupler from
G
the wire harness.
Connect the pocket tester (Ω × 1) to the
G
stator coil.
Battery (+) lead → White 1 terminal
Battery (–) lead → Black 2 terminal
Measure the charging coil resistance.
G
Charging coil resistance:
0.32 ~ 0.48 Ω at 20°C
(White - Black)
5.Wiring connection
Check the entire charging system for con-
G
nections.
Refer to the "WIRING DIAGRAM" section.
Replace rectifier/regulator.
*
C0NTINUITY
OUT OF
SPECIFICATION
MEETS
SPECIFICATION
CORRECT
CHARGING SYSTEM
MEETS SPECIFICATION
Replace battery.
OUT OF SPECIFICATION
Replace stator assembly.
POOR CONNECTION
Correct.
7 - 27
– +
ELEC