Basic Information Identification Make: Yamaha Model: DT125 / DT125R Year Range: 1988-2002 Product Name: Yamaha DT125 DT125R 1988-2002 Workshop Repair Service Manual PDF Download Introduction Market Position Target Audience: Owners and independent repair shops of Yamaha DT125 and DT125R motorcycles (1988-2002). Competitive Analysis Advantage: Provides the same comprehensive information used by local service/repair shops, offering factory-level detail often unavailable in generic online sources or consumer-oriented guides. Key Features Digital Benefit: Instant download capability, eliminating shipping costs and delays. Users can print specific sections for on-hand use, keeping the original digital file clean. Content Quality: Original factory manual, complete and intact, ensuring accuracy and exhaustiveness. Features hundreds of pages of diagrams and detailed information. Manual Details Coverage Areas Covered Models: All DT125 and DT125R models within the 1988-2002 production years, encompassing all engine, transmission, and trim variations. Page Count Estimated Page Count: Hundreds (specific count not provided but implied to be extensive due to detailed coverage) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download Manual Coverage Systems Covered Engine Systems: General Information, Fuel System, Cooling System, Engine Top End, Engine Lubrication System, Engine Removal/Installation, Crankshaft, Transmission. Drivetrain Systems: Clutch, Crankshaft/Transmission, Wheels/Tires, Final Drive. Chassis Systems: Brakes, Suspension, Steering, Frame. Electrical Systems: Electrical System, Wiring Diagrams. Procedures Included Repair Procedures: Step-by-step repair procedures, disassembly, assembly, cleaning, and reinstallation procedures for all covered systems. Maintenance Procedures: Detailed maintenance information, service intervals, fluid specifications. Troubleshooting: Comprehensive troubleshooting guides, diagnostic information, electrical service procedures. Technical Depth Depth: Complete professional-level coverage, including critical specifications, detailed diagrams, illustrations, and photos. Suitable for both novice and experienced technicians. Manual Specifications File Format File Format: PDF Print Quality Printable: Full Printable Zoom Functionality: Zoom IN/OUT capable Binding Type Binding: Digital (no physical binding) Paper Type Paper Type: Digital (no physical paper) Engine Specifications Primary Engine Engine Type: Typically a 2-stroke, single-cylinder, liquid-cooled (DT125R) or air-cooled (DT125) engine. Specific configurations may vary slightly across the model years within the range. Performance Displacement Range: Likely around 123-130cc, common for the DT125 series. Fuel System Carburetion: Details on carburetor type (e.g., Mikuni VM series), jetting, float levels, and adjustment procedures. Transmission Standard Type: Typically a 6-speed constant mesh manual transmission. Features Clutch Type: Wet, multi-plate clutch system. Dimensions Weights Dry Weight: Varies by specific DT125/DT125R model variant and year, typically in the range of 110-130 kg (240-290 lbs) for the DT125R. Safety Features Active Features Braking System: Details on front and rear brake systems, likely including disc brakes for the DT125R and potentially drum brakes on earlier or base DT125 models. Includes inspection, adjustment, and replacement procedures. Suspension System: Comprehensive coverage of front and rear suspension components, including fork oil specifications, seal replacement, and shock absorber service. Technology Features Infotainment Features: Primarily mechanical and electrical systems. Infotainment is not applicable to this model; focus is on functional operation and maintenance. Driver Assistance Features: Not applicable. Focus is on rider-controlled mechanical systems. Maintenance Service Intervals Typical Intervals: The manual will detail intervals for routine checks such as spark plug inspection, air filter cleaning/replacement, chain lubrication, brake pad wear, and gearbox oil changes. More in-depth service like top-end rebuilds will have specific mileage or hour-based recommendations. Fluid Specifications Engine Oil: Specific recommendations for 2-stroke pre-mix oil or oil injection system oil, and gearbox oil (e.g., SAE 80 or SAE 10W-40 GL-4 transmission oil). Coolant: For liquid-cooled models (DT125R), specific coolant type and mixture ratio (e.g., 50/50 ethylene glycol and distilled water). Known Issues Common Wear Items: The manual will likely provide guidance on common wear items such as piston rings, clutch plates, seals, wheel bearings, and steering head bearings. Electrical Gremlins: Troubleshooting sections will address typical electrical issues common to motorcycles of this era, such as stator and ignition coil testing, regulator/rectifier checks, and wiring harness integrity. Vehicle History Brand Heritage Yamaha Legacy: Yamaha's long-standing reputation for producing reliable and performance-oriented off-road and dual-sport motorcycles, with the DT series being iconic for its durability and versatility. Model Evolution Dt125 Lineage: The DT125 series has a history dating back to the 1970s, evolving over the years to incorporate technological advancements and adapt to changing market demands. The DT125R introduced liquid cooling and improved performance for the late 80s and 90s. Production Production Period: The specified range covers a significant portion of the DT125R's production life, indicating consistent mechanical and electrical configurations within this timeframe. Awards & Recognition Recognitions Model Reputation: The Yamaha DT series, including the DT125R, is widely recognized for its off-road prowess, durability, and suitability as a platform for modification and customization, earning it a dedicated following among enthusiasts.