Model Variant:
DT125RE, DT125X
Model Years Covered:
2002, 2003, 2004, 2005, 2006, 2007, 2008
Chassis Codes:
DT125RE (e.g., 5FW1, 5FW2), DT125X (e.g., 4SP1)
Target Audience:
Yamaha DT125RE/DT125X owners, independent repair shops, motorcycle mechanics
Value Proposition:
Provides dealership-level service information, enabling cost savings on maintenance and repairs, and empowering owners with knowledge.
Features:
Step-by-step instructions, detailed diagrams, illustrations, wiring schematics, comprehensive specifications, troubleshooting guide
Primary Coverage:
Comprehensive service, repair, and maintenance for Yamaha DT125RE and DT125X models
Estimated Page Count:
Likely 300+ pages (typical for comprehensive service manuals)
Type:
Service Repair Workshop Manual
Compatibility:
Compatible with all versions of Windows and Mac OS
Viewing Requirements:
Adobe PDF Reader
Download Speed:
Fast Download
File Format Details:
High-resolution PDF with searchable text and embedded images/diagrams
Print Quality:
Printable pages allowing for individual section printing
Binding Type:
N/A (Digital Download - PDF)
Paper Type:
N/A (Digital Download - PDF)
Engine:
Engine specifications, removal/installation, internal components, troubleshooting
Fuel System:
Carburetor (settings, cleaning, repair), fuel lines, fuel tank
Cooling System:
Radiator, coolant, hoses, water pump
Transmission:
Gearbox operation, removal, installation, internal components, maintenance
Drive Train:
Drive chain, sprockets (maintenance, replacement)
Electrical System:
Ignition system, lighting, battery, charging system, wiring diagrams, troubleshooting
Suspension:
Front forks, rear shock absorbers (maintenance, adjustment, repair)
Brakes:
Front and rear brake systems (discs, calipers, master cylinders, bleeding, adjustments)
Steering System:
Handlebars, steering stem, bearings (maintenance, adjustment)
Body Work:
Fairings, seat, fenders, plastics (removal, installation, care)
Intake Exhaust:
Airbox, exhaust system (maintenance, inspection)
Routine Maintenance:
Oil changes, filter replacements, chain adjustments, bolt torquing, general inspections
Periodic Checks Adjustments:
Valve clearance (if applicable to 2-stroke), clutch, throttle, brake lever adjustments
Troubleshooting:
Diagnostic procedures for common and advanced issues
Repair:
Step-by-step instructions for component repair and replacement
Disassembly Reassembly:
Detailed procedures for major component removal and installation
Depth:
Complete workshop level (suitable for professional technicians and experienced DIYers)
Included Diagrams:
Detailed exploded views and assembly diagrams for all major components
Included Schematics:
Complete electrical wiring diagrams for the entire motorcycle
Engine Type:
Liquid-cooled, 2-stroke, reed valve induction
Bore X Stroke:
56.5 mm x 50.7 mm (Typical for DT125R/RE, confirm for X variant)
Compression Ratio:
Approximately 7.2:1 (check specific model for exact)
Horsepower:
Approx. 23-26 HP (Varies by market and specific model variant, e.g., RE vs. X)
Torque:
Approx. 20-22 Nm (Varies by market and specific model variant)
Carburetor Model:
Mikuni VM28 (Typical for DT125RE, confirm for X variant)
Fuel Type:
Unleaded gasoline (Octane rating as specified in manual)
Oil Mixture:
Pre-mix or Autolube system (as specified by Yamaha)
Engine Oil Change:
Every 3,000-5,000 km or annually (Consult manual for precise interval and oil type)
Spark Plug Inspection:
Every 2,000-3,000 km
Air Filter Cleaning:
Every 2,000-4,000 km (more frequently in dusty conditions)
Drive Chain Lubrication Adjustment:
Every 500-1,000 km or after washing/wet riding
Engine Oil:
Yamalube 2-stroke oil or API TC, JASO FD/FC certified synthetic 2-stroke oil (Check manual for specific recommendations)
Coolant:
Yamaha Coolant or equivalent ethylene glycol-based antifreeze with distilled water (50/50 mix)
Carburetor Tuning:
Can require periodic adjustment due to fuel variability or wear. Yamaha manual provides detailed tuning procedures.
Exhaust Valve Cleaning:
Carbon buildup on the exhaust power valve can affect performance and may require periodic cleaning as per manual instructions.
Suspension Seals:
Front fork seals can wear over time, requiring replacement. Manual details fork oil levels and seal replacement.
Yamaha Motorsport:
Yamaha has a rich history in motorcycle racing and off-road performance, consistently innovating in engine technology and chassis design.
Dt Series Legacy:
The DT series is renowned for its dual-sport capabilities, durability, and off-road prowess, tracing its lineage back to the original DT-1.
Production Era:
The DT125RE and DT125X represent a modern iteration of the DT line, incorporating updated styling and technology for the early 2000s.
