Specifications

Chapter 6 Electrical system
Refer to Chapter 7 for information relating to the 1985 on Brazilian models
Contents
General description 1
Checking the electrical system : general 2
Charging system : checking the output 3
Rectifier : checking for malfunctions 4
Battery : charging procedure and maintenance 5
Headlamp : replacing bulbs and adjusting beam height 6
Tail and stop lamp : replacing bulbs 7
Rear brake stop lamp switch : adjusting 8
Front brake stop lamp switch : location and replacement 9
Instrument illumination and warning lamps replacing bulbs 10
Flashing indicator lamps 11
Flasher unit : location and replacement 12
Headlamp dip switch 13
Horn push and horn adjustment 14
Fuse : location and replacement 15
Ignition switch: location and replacement 16
Resistor: function and testing 17
Wiring: layout and examination 18
Fault diagnosis 19
Specifications
Electrical system
Voltage 6
Earth connection Negative (—)
Generator output 81W a> 6000 rpm
Fuse rating 10A
Battery
Make and type Yuasa 6N6-3B
Capacity 6Ah
Bulbs
Headlamp 6V, 25/25W
Pilot lamp
Early CG125 models N/App
Later CG125 models, CG125 K1, B 6V, 4W
CG125-C, E 6V, 3W
Speedometer illumination
CG125, CG125 K1, B 6V, 1.7W
CG125-C, E 6V, 3.4W
Flashing indicator warning 6V, 1.7W
Neutral indicator
CG125, CG125 K1, B 6V, 3W
CG125-C, E 6V, 3.4W
Flashing indicator lamps 6V, 18W
Stop/tail lamp 6V, 21/5W
Note: Some CGI25-C and E models may use 6V, 17/5.3W stop/tail lamp bulbs - check bulbholder marking for correct
bulb rating
1 General description
The electrical system is powered by a generator mounted
on the left-hand end of the crankshaft. It is normally of ND
(Nippon Denso) manufacture, though occasionally a Hitachi unit
is used. The latter can be identified by its having three
generating coils, as opposed to the ND unit which has two. Care
must be taken to obtain parts which are designed for each type
of generator, but apart from this, they can be regarded as
identical in function.
Alternating current produced by the generator is passed
through a silicon rectifier which converts it to direct current,
which in turn is fed to the battery. Output from the generator is
matched to differing loadings on the system in accordance with
the various switch positions.
2 Checking the electrical system: general
Many of the test procedures applicable to motorcycle
electrical systems require the use of test equipment of the mul-
timeter type. Although the tests themselves are quite straight-
forward, there is a real danger, particularly on alternator
systems, of damaging certain components if wrong connections
are made. It is recommended, therefore, that no attempt be
made to investigate faults in the charging system, unless the
owner is reasonably experienced in the field. A qualified Honda
Service Agent will have in his possession the necessary
diagnostic equipment to effect an economical repair.