ALTERNATOR CHARGING COIL. Honda CBR125R

The Honda CBR125R is a lightweight and powerful motorcycle designed for both beginners and experienced riders. It features a liquid-cooled, single-cylinder engine with PGM-FI fuel injection, delivering reliable performance. The CBR125R also boasts a modern design with sleek bodywork and a comfortable riding position. This manual provides comprehensive service procedures, maintenance schedules, and troubleshooting information for the CBR125R, ensuring optimal performance and safety.

ALTERNATOR CHARGING COIL

It is not necessary to remove the stator coil to perform this test.

INSPECTION

Disconnect the alternator/CKP sensor 6P (Natural) connector.

BATTERY/CHARGING SYSTEM

6P (NATURAL) CONNECTOR

Measure the resistance between the Yellow wire terminals of the alternator side connector.

STANDARD: 0.2 – 0.6

Ω (20 ° C/68 ° F)

Replace the alternator stator if the resistance is out of specification, or if any wire has continuity to ground.

For stator replacement (page 11-6).

6P (NATURAL) CONNECTOR

REGULATOR/RECTIFIER

It is not necessary to remove the stator coil to perform this test.

SYSTEM INSPECTION

Turn the ignition switch OFF.

Disconnect the regulator/rectifier 6P (Black) connector, and check it for loose contacts or corroded terminals.

If the charging voltage reading (page 16-6) is out of

the specification, check the following at the wire harness side connector:

Item Terminal

Battery charging line

Red (+) and ground (–)

Charging coil line Yellow and

Yellow

Ground line Green and ground

Specification

Battery voltage should register

0.2 – 0.6 Ω at (20 ° C/68 ° F)

Continuity should exist

If all components of the charging system are normal and there are no loose connections at the regulator/ rectifier connector, replace the regulator/rectifier unit.

6P (BLACK) CONNECTOR

16-7

BATTERY/CHARGING SYSTEM

REMOVAL/INSTALLATION

Remove the left middle cowl (page 2-9).

Disconnect the regulator/rectifier 6P (Black) connector.

Remove the bolts and regulator/rectifier from the frame.

Install the regulator/rectifier in the reverse order of removal.

BOLTS

REGULATOR/

RECTIFIER

6P (BLACK)

CONNECTOR

16-8

17. IGNITION SYSTEM

SYSTEM LOCATION································· 17-2

SYSTEM DIAGRAM·································· 17-2

SERVICE INFORMATION ························· 17-3

TROUBLESHOOTING ······························· 17-4

IGNITION SYSTEM INSPECTION············ 17-5

IGNITION TIMING ···································· 17-7

IGNITION COIL ········································· 17-8

17-1

Key Features

Liquid-cooled engine
PGM-FI fuel injection
Sleek design
Lightweight
Powerful
Comfortable riding position
Comprehensive service manual

Frequently Answers and Questions

What type of engine oil is recommended for the CBR125R?

Honda recommends using "4-stroke motorcycle oil" or an equivalent with API classification SG or higher and JASO T 903 standard: MA. The viscosity should be SAE 10W-30.