16. Electrical (Specifications)

3-7spec tableUnverified

Ignition timing differs SOHC (18°) vs DOHC (16°). Starting motor specs split by manufacturer ND vs MITSUBA. Spark plug type cross-referenced to Section 16.

Continued from 3-6

Unit: mm (in.)

Component	Measurement	Standard (New)
Ignition coil	Rated voltage	12 Volts
Ignition coil	Primary winding resistance	0.378—0.462 ohms
Ignition coil	Secondary winding resistance	9,440—14,160 ohms
Ignition wire	Resistance	25,000 ohms max.
Spark plug	Type	See Section 16
Spark plug	Gap	1.0—1.1 (0.039—0.043)
Ignition timing	At idling SOHC	18° ± 2° (Red) BTDC
Ignition timing	At idling DOHC	16° ± 2° (Red) BTDC
Battery	Lighting capacity (20-hour ratio)	40, 45, 47 Ampere Hours
Battery	Starting capacity (5-second ratio)	8.6 V min. at 300 Ampere draw
Alternator	Output	13.5V / 60A

Ignition coil

MeasurementRated voltage

Standard (New)12 Volts

Ignition coil

MeasurementPrimary winding resistance

Standard (New)0.378—0.462 ohms

Ignition coil

MeasurementSecondary winding resistance

Standard (New)9,440—14,160 ohms

Ignition wire

MeasurementResistance

Standard (New)25,000 ohms max.

Spark plug

MeasurementType

Standard (New)See Section 16

Spark plug

MeasurementGap

Standard (New)1.0—1.1 (0.039—0.043)

Ignition timing

MeasurementAt idling SOHC

Standard (New)18° ± 2° (Red) BTDC

Ignition timing

MeasurementAt idling DOHC

Standard (New)16° ± 2° (Red) BTDC

Battery

MeasurementLighting capacity (20-hour ratio)

Standard (New)40, 45, 47 Ampere Hours

Battery

MeasurementStarting capacity (5-second ratio)

Standard (New)8.6 V min. at 300 Ampere draw

Alternator

MeasurementOutput

Standard (New)13.5V / 60A

Alternator

Measurement	Standard (New)	Service Limit
Coil resistance (rotor)	2.8—3.0 ohm	±0.1 ohm
Slip ring O.D.	32.5 (1.28)	32.1 (1.26)
Brush length	15.5 (0.61)	5.3 (0.21)
Brush Spring tension	300—500g (10.6—17.6 oz)	—

Coil resistance (rotor)

Standard (New)2.8—3.0 ohm

Service Limit±0.1 ohm

Slip ring O.D.

Standard (New)32.5 (1.28)

Service Limit32.1 (1.26)

Brush length

Standard (New)15.5 (0.61)

Service Limit5.3 (0.21)

Brush Spring tension

Standard (New)300—500g (10.6—17.6 oz)

Service Limit—

Starting motor

Measurement	ND 1.0 kw, 1.2 kw — Standard (New)	ND 1.0 kw, 1.2 kw — Service Limit	MITSUBA 1.0 kw, 1.4 kw — Standard (New)	MITSUBA 1.0 kw, 1.4 kw — Service Limit
Mica depth	0.5—0.8 (0.020—0.031)	0.2 (0.008)	0.4—0.5 (0.016—0.020)	0.15 (0.006)
Commutator	0—0.02 (0.008)	0.05 (0.002)	0—0.02 (0.0008)	0.05 (0.002)
Commutator O.D.	29.9—30.0 (1.18)	29.0 (1.14)	28.0—28.1 (1.10—1.11)	27.5 (1.08)
Brush length	12.5—13.5 (0.49—0.53)	8.5 (0.33)	14.3—14.7 (0.56—0.58)	9.3 (0.37)
Spring Pressure (new)	18.1—2.89 N (1.85—2.4 kg, 4.1—5.4 lb)	—	20.1—26.5 N (2.05—2.7 kg, 4.5—6.0 lb)	—

Mica depth

ND 1.0 kw, 1.2 kw — Standard (New)0.5—0.8 (0.020—0.031)

ND 1.0 kw, 1.2 kw — Service Limit0.2 (0.008)

MITSUBA 1.0 kw, 1.4 kw — Standard (New)0.4—0.5 (0.016—0.020)

MITSUBA 1.0 kw, 1.4 kw — Service Limit0.15 (0.006)

Commutator

ND 1.0 kw, 1.2 kw — Standard (New)0—0.02 (0.008)

ND 1.0 kw, 1.2 kw — Service Limit0.05 (0.002)

MITSUBA 1.0 kw, 1.4 kw — Standard (New)0—0.02 (0.0008)

MITSUBA 1.0 kw, 1.4 kw — Service Limit0.05 (0.002)

Commutator O.D.

ND 1.0 kw, 1.2 kw — Standard (New)29.9—30.0 (1.18)

ND 1.0 kw, 1.2 kw — Service Limit29.0 (1.14)

MITSUBA 1.0 kw, 1.4 kw — Standard (New)28.0—28.1 (1.10—1.11)

MITSUBA 1.0 kw, 1.4 kw — Service Limit27.5 (1.08)

Brush length

ND 1.0 kw, 1.2 kw — Standard (New)12.5—13.5 (0.49—0.53)

ND 1.0 kw, 1.2 kw — Service Limit8.5 (0.33)

MITSUBA 1.0 kw, 1.4 kw — Standard (New)14.3—14.7 (0.56—0.58)

MITSUBA 1.0 kw, 1.4 kw — Service Limit9.3 (0.37)

Spring Pressure (new)

ND 1.0 kw, 1.2 kw — Standard (New)18.1—2.89 N (1.85—2.4 kg, 4.1—5.4 lb)

ND 1.0 kw, 1.2 kw — Service Limit—

MITSUBA 1.0 kw, 1.4 kw — Standard (New)20.1—26.5 N (2.05—2.7 kg, 4.5—6.0 lb)

MITSUBA 1.0 kw, 1.4 kw — Service Limit—

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16. Electrical (Specifications)

Alternator

Starting motor

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