Yamaha YZ 2020 Series, Owner'S Service Manual

Page: 54 / 376

ELECTRICAL SPECIFICATIONS
2-9
EAM20130
ELECTRICAL SPECIFICATIONS
Voltage
System voltage 12 V
Ignition system
Ignition system TCI
Ignition timing (B.T.D.C.) 8.0–12.0

/2000 r/min
Engine control unit
Model BAJ0
Ignition coil
Primary coil resistance 2.16–2.64

Secondary coil resistance 8.64–12.96 k

Spark plug cap
Resistance 7.50–12.50 k

Lean angle sensor
Operating angle 45

Charging system
Charging system AC magneto
Standard output 14.0 V, 5.4 A at 5000 r/min
Stator coil resistance 0.512–0.768

Rectifier/regulator
Regulator type Single-phase
Regulated voltage (DC) 14.0–14.8 V
Battery
Model BR98
Voltage, capacity 12 V, 2.4 Ah (5 HR)
Indicator light
Fuel level warning light 1.7 W
Engine trouble warning light 1.7 W
Starter motor
Brush overall length 7.0 mm (0.28 in)
Brush overall length limit 3.5 mm (0.14 in)
Brush spring force 3.92–5.88 N (400–600 gf, 14.11–21.17 oz)
Mica undercut (depth) 1.50 mm (0.06 in)
Fuel injection sensor
Crankshaft position sensor resistance 228–342

Intake air temperature sensor resistance 5400–6600

at 0

C (5400–6600

at 32

F)
Intake air temperature sensor resistance 289–391

at 80

C (289–391

at 176

F)
Coolant temperature sensor resistance 2513–2777

at 20

C (2513–2777

at 68

F)
Coolant temperature sensor resistance 210–221

at 100

C (210–221

at 212

F)
Fuse(s)
Main fuse 15.0 A
Radiator fan motor fuse 5.0 A
Spare fuse 15.0 A