Honda CBR250R & CBR250RA Service Manual, 2011–2013

Honda factory service information for the CBR250R and CBR250RA, covering the standard brake system and the RA’s combined ABS configuration.

PDF Bookmarks and Wiring Diagram Readability

Search, navigation, and diagram detail: PDF text search is unavailable. Embedded bookmarks open the 22 main chapters. Small wiring labels require zooming; some labels at the outer edges of both wiring sheets are cropped.

Supplied as one printable English-language PDF with 499 pages, including the opening contents page and two index pages.

Engine Repair, PGM-FI Diagnosis, and Combined ABS

The following selected coverage highlights outline major workshop tasks rather than reproduce the complete contents. Other topics include headlight aiming and sidestand-switch inspection.

• Engine and drivetrain repair: Step-by-step procedures for engine removal, cylinder-head and valve service, cylinder/piston inspection, clutch repair, crankcase separation, and transmission disassembly.

• PGM-FI troubleshooting: MIL and DTC diagnosis, ECM connector checks, sensor power-line inspection, fuel-pressure and fuel-flow testing, and fuel-system component service.

• Chassis and hydraulic brakes: Fork disassembly and assembly, seal and bushing replacement, steering-stem and wheel-bearing service, rear suspension work, master-cylinder repair, and caliper service.

• CBR250RA combined ABS: Problem-code diagnosis, indicator-circuit checks, pre-start self-diagnosis, wheel-speed-sensor and air-gap inspection, modulator replacement, and PCV and delay-valve procedures.

• Cooling and lubrication: Cooling-system pressure tests, thermostat inspection, radiator and fan service, coolant replacement and bleeding, water-pump seal replacement, and oil-pump inspection.

• Diagrams and service data: Model-specific wiring diagrams, connector views, routing drawings, system schematics, torque tables, capacities, wear limits, clearances, and electrical test specifications.

This workshop-level material suits professional technicians and experienced owners with motorcycle service knowledge and access to the specified measuring equipment and special tools.

Maintenance and Internal Engine Work

Routine coverage includes the maintenance schedule, valve-clearance inspection and shim selection, idle-speed checks, drive-chain adjustment, brake inspection, coolant service, steering-head bearings, suspension, wheels, tires, and fastener checks.

Cylinder-head service: Camshaft and rocker-arm work extends to valve-guide replacement, valve-seat inspection and refacing, and cam-chain tensioner procedures. Camshaft service can be performed with the engine installed; cylinder-head and cylinder/piston service requires engine removal.

Bottom-end repair: The internal inspection material covers the crankshaft and connecting rod, coded main-journal bearing selection, transmission gears and shift forks, balancer timing, bearing replacement, and crankcase assembly. Clutch, primary-drive, alternator, starter-clutch, and gearshift-linkage procedures extend coverage beyond engine removal alone.

The crankcase assembly cautions address misalignment and damage to oil-seal lips when the case halves are forced together. The bearing section explains how interchanging main-journal inserts can produce incorrect oil clearance and engine damage.

Fuel-System Testing and Electronic Diagnosis

The PGM-FI material covers the throttle body, injector, IACV, fuel pump and relay, O2 sensor, PAIR secondary-air system, and EVAP controls. Fuel-line quick-connect procedures, pressure relief, and pressure normalization accompany the component instructions.

Fault isolation: System layouts and connector locations support individual sensor-circuit checks, MIL troubleshooting, DTC readout and erasure, fail-safe information, and ECM inspection. The HDS pocket tester provides subcodes and freeze data; MIL blink patterns identify the main code only.

The throttle-body section also describes the fully closed throttle-position reset required after sensor-unit removal.

Cooling and Lubrication Service

Cooling coverage includes a system flow pattern, coolant gravity chart, radiator-cap testing, fan-control relay checks, and water-pump bearing, mechanical-seal, and oil-seal replacement. The mechanical-seal installation calls for a hydraulic press.

The lubrication-system diagram accompanies oil-strainer, oil-pump, and pressure-relief-valve service information, with component inspection limits.

Chassis Work and Brake Variants

Body-panel and exhaust removal, fuel-tank access, cable and harness routing, and component assembly views support access to the chassis systems. Rear suspension coverage includes shock linkage and swingarm work; the shock absorber itself is inspected and replaced as an assembly.

R versus RA procedures: Separate brake-filling, bleeding, and front-caliper instructions help identify the correct repair procedure for each configuration. The ABS chapter adds hydraulic-component and connector locations, an ABS system diagram, and fault-tracing procedures.

The ABS modulator contains the control unit and is replaced as a complete assembly; internal modulator disassembly is prohibited.

Secure support and the manual’s fuel-pressure and brake-fluid precautions are required for the relevant engine, chassis, fuel, and brake work.

Charging, Ignition, and Instrument Checks

Electrical coverage includes battery testing, current leakage, charging-voltage checks, alternator charging-coil inspection, regulator/rectifier diagnosis, ignition peak-voltage tests, and starter-motor and relay service. Ignition and starter schematics accompany the separate CBR250R and CBR250RA wiring diagrams.

Combination-meter functions, switches, lighting, fuel-level sensing, and the vehicle-speed sensor receive their own inspection information. Final symptom-based charts address hard starting, loss of power, poor low- or high-speed performance, and handling complaints.

Specified Workshop Tools

Tool references include the HDS pocket tester TDS3557-0112-01 for U.S. use, fuel-pressure gauge 07406-0040004, valve-spring compressor 07757-0010000, fork-seal driver 07747-0010100, and steering-stem socket 07916-3710101. U.S.-specific or equivalent alternatives are identified where applicable.

Selected Valve-Clearance and Fuel-Pressure Specifications

Valve-clearance data: The maintenance section specifies cold-engine clearances, below 35°C (95°F), of 0.16 ± 0.03 mm intake and 0.27 ± 0.03 mm exhaust. It also provides the shim-selection calculation.

Fuel-pressure testing: The fuel-system chapter specifies 294 kPa (43 psi) at idle, alongside gauge-connection information and diagnostic checks for readings above or below specification.