2004–2009 Honda CRF250R Service & Repair Manual (P/N 61KRN05)

This Honda service manual covers the 2004–2009 CRF250R motocross models, with model-year differences identified throughout the engine, chassis, fuel, and electrical sections. Publication P/N 61KRN05 includes factory maintenance, troubleshooting, and repair procedures.

• Engine repair: Cylinder-head service, valve-clearance adjustment, valve-guide replacement, cam timing, cylinder inspection, and piston replacement.

• Drivetrain service: Crankcase separation, crankshaft and transmission inspection, balancer timing, clutch repair, kickstarter service, and gearshift linkage overhaul.

• Fuel system: FCR carburetor disassembly, accelerator-pump inspection, throttle-position sensor replacement, and jetting charts for temperature and altitude.

• Cooling and lubrication: Water-pump rebuilding, radiator pressure tests, coolant bleeding, and oil-pump, relief-valve, strainer, and oil-jet inspection.

• Suspension and steering: Front-fork damper service, Pro-Link shock and linkage overhaul, swingarm bearings, and Honda Progressive Steering Damper (HPSD) service.

• Hydraulic brakes: Front and rear master-cylinder and caliper repair, brake-fluid replacement, air bleeding, and brake-pad and disc inspection.

• Electrical diagnosis: Ignition coil, CKP sensor, exciter coil, and throttle-position sensor tests, supported by troubleshooting charts and model-year-specific wiring diagrams.

Written for qualified professional technicians, this manual assumes established shop skills and access to the specified tools and test equipment.

Engine Repair and Drivetrain Service

The engine chapters distinguish work possible with the engine in the frame from crankshaft, transmission, and oil-pump service that requires engine removal. Cylinder-head procedures extend to shim selection, valve-seat refacing, and inspection of the automatic decompressor.

The intake-valve section explains why lapping damages the titanium valves’ oxide coating. The oil-filter instructions also identify reversed filter installation as a cause of severe engine damage.

Transmission assembly drawings distinguish the 2004–2008 and later shaft arrangements. Clutch coverage identifies the judder spring and spring seat used after 2007, alongside disc, plate, and lifter inspections.

FCR Carburetor Tuning

The fuel section assigns carburetor identification numbers FCR01A through FCR01F to individual model years. Its Tuning Information Charts match jetting to temperature and altitude, helping technicians select the applicable baseline before evaluating running problems.

Accelerator-pump coverage includes the diaphragm, push rod, and bypass jet. Throttle-position sensor replacement includes resistance-based adjustment; the tools list identifies carburetor float-level gauge 07401-0010000.

Cooling and Oil-Circuit Service

The cooling System Flow Pattern supports radiator-cap testing, coolant replacement, and water-pump bearing and seal work. The Lubrication System Diagram accompanies oil-strainer, relief-valve, oil-jet, and pump-rotor inspections.

Engine and transmission oil have separate level-checking and draining procedures. The general-information section also provides service rules, component-specific torque tables, lubrication and seal points, and cable and harness routing illustrations.

Forks, Pro-Link Suspension, and HPSD

Suspension coverage includes fork-damper refilling and operational checks, Pro-Link exploded views, shock-bladder replacement, and linkage-bearing service. HPSD drawings explain progressive damping, and the service section covers bleeding, spherical bearings, and free-piston checks.

The HPSD damper rod/piston is replaced as an assembly. Detailed shock-preload and damping setup for riding conditions and rider skill is referred to the separate Owner’s Manual.

Follow the manual’s safety precautions when working with the nitrogen-pressurized rear shock absorber.

Brakes and Ignition Fault Finding

Brake variants: Separate procedures cover the early and later front master cylinders, including piston and cup inspection. Caliper sections document seal replacement and reassembly.

Ignition checks: The no-spark troubleshooting chart works with peak-voltage and resistance tests for the direct ignition coil, exciter coil, and CKP sensor. Connector-level checks help distinguish harness faults from component failures before replacement. Ignition timing is checked rather than adjusted because the ignition control module (ICM) is factory preset.

Separate wiring diagrams cover 2004–2007 and 2008–2009 configurations, including wire-color legends and connector details.

A Preview of Fluid Capacities and Fastener Data

These are a few examples from the manual’s capacity and torque tables.

Transmission oil capacity after draining is 0.72 liter for 2004 and 0.60 liter for 2005–2009. Cooling-system capacity is 0.93 liter at a coolant change and 1.00 liter after disassembly.

The cam-chain tensioner bolt is listed at 12 N·m, with a thread-locking-agent note in the torque table.

Text Search, Bookmarks, and PDF Contents

Search and diagram detail: The PDF has an OCR text layer, but recognition errors limit exact searches, and the first two pages have no searchable text. Embedded bookmarks link to the contents, chapters, and wiring diagrams. Small wiring labels are readable when enlarged.

Supplied as one printable English PDF with 406 pages total. This count includes four preliminary pages—cover, safety information, how-to-use/contents, and symbols—and one memo page.