O. Honda CBR125R 430 Pages
O. 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.
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O
2
SENSOR
• Do not get grease, oil or other materials in the O
2 sensor air hole.
• The O
2
sensor may be damaged if dropped.
Replace it with a new one, if dropped.
• If the O
2
sensor cap is disconnected, replace the
O
2
sensor cord with a new one, do not reuse O
2 sensor cord .
REMOVAL
• Handle the O
2
sensor with care.
• Do not service the O
2
sensor while it is hot.
Remove the right middle cowl (page 2-9).
Disconnect the O
2
sensor 2P (natural) connector.
FUEL SYSTEM (PGM-FI)
Remove the O
2
sensor cover and disconnect the O
2 sensor cap.
Discard the O
2
sensor cord.
2P (NATURAL) CONNECTOR
O 2 SENSOR COVER O 2 SENSOR CAP
Remove the O
2
sensor.
O 2 SENSOR
5-67
FUEL SYSTEM (PGM-FI)
INSTALLATION
• Do not use an impact wrench while removing or installing the O
2
sensor, or it may be damaged.
Install and hand tighten a new O
2
sensor onto the cylinder head.
Tighten the O
2
sensor to the specified torque.
TORQUE: 25 N·m (2.5 kgf·m, 18 lbf·ft)
Connect the O
2
sensor cap by installing a new O
2 sensor cord.
• Take care not to tilt the O
2
sensor cap when connecting the cap to the O
2
sensor.
• Do not turn the O
2
sensor cap, after connecting it.
Install the O
2
sensor cover aligning its tab with between the fins of the cylinder head.
Install the right middle cowl (page 2-9).
O
2
SENSOR O
2
SENSOR CAP
O 2 SENSOR
CORD
Connect the O
2
sensor 2P (natural) connector.
Align O 2 SENSOR COVER
2P (NATURAL) CONNECTOR
5-68
6. COOLING SYSTEM
SYSTEM FLOW PATTERN ························· 6-2
SERVICE INFORMATION ··························· 6-3
TROUBLESHOOTING ································· 6-4
SYSTEM TESTING······································ 6-5
COOLANT REPLACEMENT ························ 6-6
THERMOSTAT ············································ 6-8
THERMOSTAT HOUSING·························· 6-9
RADIATOR ················································ 6-10
WATER PUMP ·········································· 6-15
RADIATOR RESERVE TANK ···················· 6-19
FAN CONTROL RELAY ···························· 6-20
6
6-1
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Key Features
- Liquid-cooled engine
- PGM-FI fuel injection
- Sleek design
- Lightweight
- Powerful
- Comfortable riding position
- Comprehensive service manual
