2004–2007 Honda CBR125RW Service Repair Manual

This Honda factory service manual covers service and repair procedures for the 2004–2007 CBR125RW. It distinguishes the E, F, ED, U, II G, and CM market configurations, including regional differences in maintenance schedules, electrical equipment, and wiring.

Searchable PDF and Wiring Detail

Search, bookmarks, and diagram labels: Text search is available across the service sections, and embedded bookmarks cover chapters and individual procedures. Several introductory safety bookmarks lead to the added cover page. Small wire-color codes and ECM terminal numbers in the wiring diagrams are readable when enlarged.

One printable, English-language, 430-page PDF includes the added cover sheet and eight memo pages within the total.

Engine, PGM-FI, and Chassis Service

The following selected service topics outline the manual’s coverage rather than reproduce its full contents. Other documented work includes body-panel removal and exhaust-system installation.

• Engine repair: Engine removal and installation, cylinder-head disassembly, valve-guide replacement, valve-seat refacing, and cylinder/piston inspection.

• Clutch and transmission: Clutch disassembly, gearshift-linkage service, crankcase separation, transmission inspection, and crankshaft/balancer installation.

• PGM-FI diagnosis: DTC and MIL troubleshooting, sensor-circuit tests, fuel-pressure and delivery checks, and throttle-position reset procedures.

• Cooling and lubrication: Cooling-system pressure testing, thermostat inspection, coolant replacement, water-pump service, and oil-pump inspection.

• Suspension and brakes: Front-fork rebuilding, steering-bearing replacement, wheel service, swingarm inspection, and hydraulic brake repair and bleeding.

• Electrical systems: Charging-system diagnosis, ignition and CKP sensor tests, starter-motor overhaul, and market-specific wiring diagrams.

Written for readers who already have basic knowledge of Honda motorcycle maintenance, this manual also identifies the special tools and test equipment required for particular jobs.

Engine Work and Repair Planning

The system-based chapters help you locate service procedures and determine how much disassembly a job requires. The engine-removal section distinguishes work possible with the engine installed—such as camshaft, clutch, and oil-pump service—from cylinder-head, cylinder/piston, crankshaft/balancer, and transmission work requiring engine removal.

Step-by-step procedures cover steering-head bearing replacement, telescopic-fork disassembly and assembly, crankcase separation, and brake-fluid replacement. Engine sections add camshaft timing illustrations, component inspection criteria, and exploded assembly views.

Internal component selection: Color-coded selection tables distinguish primary drive gears and balancer driven gears. Transmission coverage includes shaft and bushing measurements, shift-fork inspection, bearing replacement, and assembly illustrations showing gear and washer positions.

Fuel Injection and Electrical Fault Finding

The PGM-FI chapter connects fault codes with symptoms, fail-safe behavior, connector checks, and circuit tests. HDS pocket-tester information covers stored faults, freeze data, and current data; separate MIL blink-code procedures provide another route to fault identification.

The PGM-FI System Diagram, PGM-FI Connector Locations, and Test Harness Terminal Layout support electrical fault tracing. Listed diagnostic equipment includes the SCS connector 070PZ-ZY30100 and ECM test harness 33P 070MZ-MCA0100.

Throttle-body limits: The throttle body and sensor unit are factory preset. The manual limits disassembly to the procedures shown and warns that disturbing the white-painted nut and screw can cause throttle-valve and idle-control failure.

Charging and ignition sections provide troubleshooting charts, alternator and regulator/rectifier checks, peak-voltage tests, and starter-circuit diagnosis. Separate complete wiring diagrams distinguish ED/E/F/II G, CM, and U configurations.

Cooling, Suspension, and Hydraulic Brakes

The cooling chapter combines the System Flow Pattern with radiator-cap testing, thermostat checks, fan service, and water-pump procedures. The Lubrication System Diagram shows oil delivery to the engine and transmission components.

Chassis instructions cover fork seals and bushings, steering-stem bearings, wheel bearings, and swingarm components. Rear-shock procedures cover removal, inspection, and replacement as an assembly. Brake sections extend beyond pad replacement to master-cylinder and caliper disassembly, inspection, assembly, and air bleeding.

The alternator section flags magnetic attraction between the flywheel and left crankcase cover, alongside precautions against damage to gasket mating surfaces.

Always observe standard workshop safety protocols when handling pressurized fuel systems or testing live electrical components.

A Preview of Valve, Cooling, and Fuel-Test Data

Valve-clearance specifications distinguish intake at 0.06 ± 0.02 mm from exhaust at 0.27 ± 0.02 mm, with inspection performed on a cold engine below 35°C/95°F. Cylinder-head cover bolts have a specified torque of 10 N·m.

Cooling data lists 0.70 liter for the radiator and engine, separately from the reserve tank. The fuel-delivery inspection specifies a minimum pump output of 13.9 cm³ per 10 seconds at 12 V.