Yamaha WR250FM service manual Electrical, 5UL-00/DENSO

MAINTENANCE SPECIFICATIONS

SPEC

EC212300

ELECTRICAL

Item	Standard	Limit
Ignition system:
Advancer type	Electrical	----
CDI:
Pickup coil resistance (color)	248 ~ 372 Ω at 20 °C (68 °F)	----
	(White – Red)
CDI unit-model/manufacturer	5UM-00/YAMAHA (For USA)	----
	5UM-10/YAMAHA (Except for USA)	----
Ignition coil:
Model/manufacturer	5UL-00/DENSO	----
Minimum spark gap	6 mm (0.24 in)	----
Primary coil resistance	0.08 ~ 0.10 Ω at 20 °C (68 °F)	----
Secondary coil resistance	4.6 ~ 6.8 kΩ at 20 °C (68 °F)	----
Charging system:
System type	AC magneto	----
Model/manufacturer	5UM-00/YAMAHA	----
Normal output	14 V/120 W at 5,000 r/min	----
Charging coil resistance (color)	0.288 ~ 0.432 Ω at 20 °C (68 °F)	----
	(White – Ground)
Lighting coil resistance (color)	0.224 ~ 0.336 Ω at 20 °C (68 °F)	----
	(Yellow – Ground)
Rectifier/regulator:
Regulator type	Semiconductor short circuit	----
Model/manufacture	SH712AA/SHINDENGEN	----
Regulated voltage (AC)	13.0 ~ 14.0 V	----
Regulated voltage (DC)	14.1 ~ 14.9 V	----
Rectifier capacity (AC)	12 A	----
Rectifier capacity (DC)	8 A	----
Electric starting system:
Type	Constant mesh	----
Starter motor:
Model/manufacturer	5UM00/YAMAHA	----
Operation voltage	12 V	----
Output	0.35 kW	----
Armature coil resistance	0.0189 ~ 0.0231 Ω at 20 °C (68 °F)	----
Brush overall length	7 mm (0.28 in)	3.5 mm (0.14 in)
Brush quantity	2 pcs.	----
Spring force	3.92 ~ 5.88 N	----
	(400 ~ 600 g, 14.1 ~ 21.2 oz)
Commutator diameter	17.6 mm (0.69 in)	16.6 mm (0.65 in)
Mica undercut (depth)	1.5 mm (0.06 in)	----

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