Yamaha RST90GTZ, Service Manual

Page: 447 / 504

SPEC
9-14
ELECTRICAL
Item Description
Voltage 12V
Ignition system:
Ignition timing (B.T.D.C.) 10.0° at 1,300 r/min
Advancer type Digital type
Ignition coil:
Ignition spark gap 6.0 mm (0.24 in)
Primary coil resistance 1.19 ~ 1.61
Ω
at 20 °C (68 °F)
Secondary coil resistance 8.5 ~ 11.5 k
Ω
at 20 °C (68 °F)
Charging system:
Type AC magneto
Normal output 14.0 V, less than 38.5 A at 5,000 r/min
AC magneto:
Standard output 14.0 V, 35.7 A at 5,000 r/min
Stator coil resistance 0.15 ~ 0.23
Ω
at 20 °C (68 °F) (White – White)
Rectifier/regulator:
Type Short circuit type
No load regulated voltage (DC) 14.2 ~ 14.8 V
Capacity (DC) 50.0 A
Withstand voltage 40.0 V
Battery:
Specific gravity 1.32
Model/manufacturer YTX20L-BS/GS YUASA
Voltage, capacity 12 V, 18.0 Ah
Ten-hour rate amperage 1.8 A
Electric starter system:
Type Constant mesh type
Starter motor:
Output 0.95 kW
Armature coil resistance
Continuity check 0.0081 ~ 0.0099
Ω
at 20 °C (68 °F)
Insulation check Above 1 M
Ω
at 20 °C (68 °F)
Brush overall length 9.8 mm (0.39 in)
<Wear limit> 4.4 mm (0.17 in)
Brush spring force 7.36 ~ 11.04 N (750 ~ 1,126 gf, 26.49 ~ 39.74 oz)
Commutator diameter 28.0 mm (1.10 in)
<Wear limit> 27.0 mm (1.06 in)
Mica undercut 1.5 mm (0.06 in)
Starter relay:
Amperage rating 180.0 A
Coil winding resistance 4.18 ~ 4.62
Ω
at 20 °C (68 °F)
T.P.S. (Throttle position sensor):
Resistance 3.0 ~ 5.7 k
Ω
(Blue – Black/Blue)
MAINTENANCE SPECIFICATIONS