Model Years Covered:
2002, 2003, 2004, 2005, 2006, 2007, 2008
Engine Codes:
Likely 3RM (specific to DT125RE/X generation, further confirmation would require manual access)
Target Audience:
Owners of Yamaha DT125, DT125RE, and DT125X models from 2002-2008 seeking to perform maintenance, repairs, and diagnostics.
Value Proposition:
Offers a cost-effective solution for maintaining vehicle reliability and performance, empowering owners to handle tasks typically reserved for professional mechanics.
Features:
Detailed illustrations, diagrams, wiring schematics, step-by-step instructions, notes/cautions/warnings, numbered instructions, printable pages.
Yamaha Legacy:
Yamaha is renowned for its robust and reliable motorcycles, particularly in the dual-sport and off-road segments, with a history of innovative engineering and performance.
Dt125 Lineage:
The DT series has a long-standing reputation for durability and off-road capability. The 2002-2008 models represent a refinement of this lineage, likely incorporating modernizations for performance and emissions while retaining the core DT spirit.
Primary Coverage:
Comprehensive service, repair, maintenance, and troubleshooting
Specific Systems Highlighted:
Engine Mechanical, Engine Electrical, Emission Control, Fuel System, Suspension, Clutch, Manual Transaxle, Steering, Brakes, Body Interior/Exterior, Body Electrical, Restraint
Estimated Page Count:
Variable, but described as 'complete service manual' covering 'every detail'. Expect 500+ pages for a full workshop manual.
Type:
Workshop Service Repair Manual, Factory Service Manual
Engine Mechanical:
Detailed disassembly, assembly, inspection, and repair of all engine components including cylinder, piston, crankshaft, connecting rod, and valve train (if applicable).
Engine Electrical:
Comprehensive coverage of ignition system, charging system, starting system, lighting, and sensors with detailed wiring diagrams.
Fuel System:
Carburetor (likely a Mikuni VM series for this era) service, adjustment, and troubleshooting; fuel pump and filter maintenance.
Transmission Drivetrain:
Clutch operation, adjustment, and replacement; manual transaxle disassembly, inspection, and repair; driveshaft and axle service.
Suspension Steering Brakes:
Front fork disassembly, seal replacement, and fluid specification; rear shock absorber service; steering head bearing maintenance; front and rear brake system inspection, fluid replacement, pad/shoe replacement, and hydraulic system troubleshooting.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning/replacement, brake adjustments.
Diagnostic Troubleshooting:
Step-by-step troubleshooting guides for common issues, electrical system diagnostics using wiring diagrams.
Repair Overhaul:
Detailed instructions for component replacement, engine rebuilds, transmission overhauls, and bodywork repairs.
Wiring Schematics:
Complete and detailed wiring diagrams for all electrical systems.
Depth:
Comprehensive, suitable for both novice DIYers and experienced professional mechanics. Covers everything from basic adjustments to full engine and transmission rebuilds.
Readability:
Searchable text (likely, depending on PDF creation), zoomable
Printability:
Fully printable
Digital Binding:
N/A (Digital Download)
Digital Paper Type:
N/A (Digital Download)
Requirements:
Adobe PDF Reader, WinZip (for potential .zip packaging)
Operating Systems:
All Versions of Windows & Mac
Engine Type:
2-stroke, liquid-cooled (likely for RE/X models, air-cooled for base DT125 if different variants existed within the generation)
Displacement:
124cc (typical for DT125)
Bore X Stroke:
Specific to engine code, e.g., 56.5 mm x 44.5 mm (requires manual confirmation)
Horsepower:
Typically around 15-20 HP, depending on market and specific model variant (e.g., power-restricted versions for certain licensing).
Torque:
Specific torque figures would be detailed in the manual.
Carburetor Type:
Likely a single Mikuni VM28SS or similar.
Fuel Delivery:
Carburetor
System:
Likely includes features like YPVS (Yamaha Power Valve System) for improved performance and emissions control across the rev range.
Length:
Approx. 2,140 mm (varies slightly by model variant)
Width:
Approx. 800 mm (varies slightly by model variant)
Height:
Approx. 1,160 mm (varies slightly by model variant)
Dry Weight:
Approx. 114-118 kg (varies by model variant)
Wet Weight:
Specific wet weight would be found in the manual.
Crash Test Results:
N/A (Motorcycle safety ratings are not typically conducted in the same manner as automobiles; focus is on design features and rider protection).
Braking System:
Front: Disc brake, Rear: Disc brake (for RE/X models); Front: Disc, Rear: Drum (possible for base DT125 depending on market).
Lighting:
Headlight, taillight, turn signals, brake lights.
Features:
Basic instrument cluster including speedometer, odometer, tachometer, neutral indicator, turn signal indicators, and warning lights. No advanced infotainment systems are present on this model.
Features:
N/A (No electronic driver assistance systems typical of modern vehicles are present).
Oil Change Engine:
Recommended every 2,000-3,000 km or annually, but specified in detail within the manual.
Spark Plug Service:
Intervals typically around 3,000-6,000 km, depending on plug type and usage.
Air Filter Cleaning:
Recommended at 1,000-2,000 km or more frequently in dusty conditions.
Engine Oil Type:
Yamalube 2-stroke (or equivalent JASO FD or higher rated 2T oil) for pre-mix or oil injection reservoir.
Transmission Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4 transmission oil).
Coolant Type:
Yamaha-specific or equivalent ethylene glycol-based coolant with distilled water (50/50 mix) for liquid-cooled models.
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch plates, piston rings, brake pads, fork seals, chain and sprockets, exhaust packing.
Typical Faults:
Carburetor gumming due to stale fuel, power valve sticking (if equipped), electrical connector corrosion, worn rear shock absorber.
Yamaha Motorcycles:
Yamaha Motor Company, established in 1955, has a deep-rooted history in motorsport and performance engineering, consistently producing iconic motorcycles across various categories.
Dt125 Development:
The DT125 platform has been a staple for Yamaha since the 1970s, evolving from its early enduro roots to incorporate more refined features and powerplant enhancements for street legality and performance.
Manufacturing Locations:
Yamaha motorcycles are manufactured globally; specific assembly locations for these models would depend on the target market. Common sites include Japan, Indonesia, and sometimes Europe or the Americas.
