Target Audience:
Do-it-yourself owners and experienced mechanics
Value Proposition:
Inexpensive way to maintain and repair the motorcycle, dealer-level information
Content Detail:
Detailed illustrations, step-by-step instructions, comprehensive coverage
Accessibility:
Printable pages for workshop use, instant download
Engine:
Complete engine disassembly, assembly, inspection, and service
Fuel System:
Carburetor tuning, cleaning, overhaul, fuel tank, fuel lines
Ignition System:
Ignition timing, spark plug analysis, stator, CDI unit
Lubrication:
Oil pump operation, two-stroke premixing, chassis lubrication points
Transmission:
Clutch assembly, gearshift linkage, gear inspection, lubrication
Brakes:
Front and rear brake system maintenance, fluid replacement, pad inspection, caliper service
Suspension:
Front fork ( Showa) overhaul, rear shock absorber service, adjustments
Electrical:
Alternator, wiring diagrams, troubleshooting lighting and ignition circuits
Cooling System:
Radiator maintenance, coolant type and levels (note: CR125R is liquid-cooled)
Scheduled Maintenance:
Regular service checks, filter replacements, adjustments
Engine Rebuild:
Complete engine disassembly, piston and cylinder inspection/replacement, crankshaft service
Troubleshooting:
Diagnostic procedures for common performance issues, electrical faults
Component Overhaul:
Detailed instructions for servicing individual components like clutch, transmission, and brakes
Depth:
Comprehensive, from basic maintenance to complete engine rebuilds and advanced diagnostics
Illustration Quality:
Detailed illustrations guiding each step
Instruction Style:
Step-by-step instructions based on complete disassembly
Printability:
All pages are printable
Searchability:
Implied by PDF format, likely text-searchable if properly created
Digital Quality:
High quality digital format suitable for printing
Binding:
Not Applicable (Digital PDF)
Paper:
Not Applicable (Digital PDF)
Delivery:
Instant Download
Shipping:
No Shipping Cost
Type:
Liquid-cooled, 2-stroke, single-cylinder
Displacement:
124.8 cc (7.6 cu in)
Bore X Stroke:
54.0 mm x 54.5 mm (2.13 in x 2.15 in)
Horsepower:
Approx. 41 HP (at 12,500 rpm) - specific figures may vary by dyno and exact model year tuning
Torque:
Approx. 17.7 lb-ft (at 11,500 rpm) - specific figures may vary
Carburetor:
Keihin PWK38, Flat-slide, with Power Jet
Fuel Type:
Unleaded gasoline, 91 octane or higher (premix with 2-stroke oil)
Fuel Capacity:
7.0 L (1.8 US gal)
Crash Test Ratings:
Not Applicable (Motorcycle, no standardized ratings like cars)
Braking System:
Hydraulic disc brakes (front and rear)
Suspension Damping:
Adjustable front forks and rear shock absorber for stability
Lighting:
Headlight, taillight, stoplight (for road legality where applicable, though primarily off-road focused)
Oil Change Transmission:
Every 15-20 hours of operation or annually
Air Filter Cleaning:
After every few rides or as needed based on conditions
Spark Plug Inspection:
Every 10-15 hours of operation
Top End Rebuild:
Recommended every 40-60 hours of operation (piston, rings, power valve)
Coolant:
Honda Motorcycle Coolant (or equivalent high-quality ethylene glycol-based coolant mixed 50/50 with distilled water)
Two Stroke Oil:
High-quality synthetic 2-stroke motorcycle oil (e.g., Honda HP-O, Yamalube 2S, Motul 800)
Power Valve Sticking:
Common issue in 2-strokes due to carbon buildup; requires regular cleaning
Clutch Wear:
Can wear prematurely with aggressive riding; requires clutch plate replacement
Suspension Seals:
Fork seals can weep; periodic inspection and replacement recommended
Manufacturer:
Honda Motor Company, Ltd.
Cr Series Legacy:
Part of Honda's highly successful CR series of motocross bikes, known for competitive performance
2004 Update Focus:
This generation saw significant updates, particularly in chassis and engine performance for improved competitiveness
Production Period:
2004-2007
Manufacturing Location:
Japan (typical for Honda performance motorcycles)
Motocross Competitiveness:
Honda CR models consistently performed well in motocross racing circuits, earning numerous victories and accolades
Industry Reputation:
The CR125R was regarded as a potent and competitive 125cc two-stroke motocross machine during its production years
Emissions Standards:
Not directly certified for road use; designed for closed-course competition where emissions are not regulated similarly to street vehicles.
