Yamaha YZ 2015 Series, Owner'S Service Manual

Page: 54 / 396

ELECTRICAL SPECIFICATIONS
2-11
EASB291059
ELECTRICAL SPECIFICATIONS
Voltage
System voltage 12 V
Ignition system
Ignition system TCI
Advancer type Digital
Ignition timing (B.T.D.C.) 10.0 ° at 2000 r/min
Engine control unit
Model/manufacturer B290/YAMAHA (USA) (CAN) (EUR) (AUS)
(NZL) (ZAF)
B291/YAMAHA (JPN)
Ignition coil
Minimum ignition spark gap 6.0 mm (0.24 in)
Primary coil resistance 2.16–2.64

Secondary coil resistance 8.64–12.96 k

AC magneto
Standard output 14.0 V, 160 W at 5000 r/min
Stator coil resistance 0.528–0.792

(W–W)
Rectifier/regulator
Regulator type Semi conductor-short circuit
No load regulated voltage 14.1–14.9 V
Rectifier capacity (DC) 23.0 A
Battery
Model YTZ7S (F)
Voltage, capacity 12 V, 6.0 Ah
Specific gravity 1.31
Manufacturer GS YUASA
Ten hour rate charging current 0.60 A
Electric starting system
System type Constant mesh
Starter motor
Power output 0.35 kW
Armature coil resistance 0.0189–0.0231

Brush overall length 7.0 mm (0.28 in)
Limit 3.50 mm (0.14 in)
Brush spring force 3.92–5.88 N (400–600 gf, 14.11–21.17 oz)
Commutator diameter 17.6 mm (0.69 in)
Limit 16.6 mm (0.65 in)
Mica undercut (depth) 1.50 mm (0.06 in)
Starter relay
Amperage 180.0 A
Coil resistance 4.18–4.62

Starting circuit cut-off relay
Coil resistance 75.6–92.5

Fuses
Main fuse 15.0 A
Spare fuse 15.0 A
Radiator fan motor fuse 5.0 A