This manual covers the TTR250, a versatile dual-sport motorcycle produced from 1999 to 2006. Known for its robust engineering and user-friendly design, the TTR250 is a capable machine for both trail riding and general use, inheriting a strong reputation for reliability and performance. This first-generation model, identifiable by VIN code prefixes 54S and 5LU, offers a balance of off-road prowess and street legality, making it a popular choice for enthusiasts seeking adventure. This comprehensive workshop repair service manual provides detailed information for all models, engines, trims, and transmission types within the specified production years. It covers a wide array of systems, including the fuel, cooling, engine lubrication, drivetrain, clutch, and chassis systems, as well as electrical components and wiring diagrams. The manual includes step-by-step repair procedures, diagnostic information, troubleshooting guides, and critical specifications, all presented with hundreds of diagrams and illustrations to assist DIY enthusiasts and professional technicians in maintaining and repairing the TTR250. 🏷️ Basic Information Identification Make: Yamaha Model: TTR250 Model Years Covered: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Generation Generation Identifier: First Generation (1999-2006) Codes Vin Code Prefix: 54S, 5LU 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, Yamaha TTR250 owners Competitive Analysis Advantage Over Competitors: Comprehensive coverage, digital format for easy printing and use, instant access, manufacturer-level detail. Key Features Manual Quality: Professional Quality, highly detailed, COMPLETE and INTACT Diagnostic Capabilities: Most comprehensive diagnostic information available Visual Aids: Hundreds of diagrams and detailed illustrations/pictures Navigational Aids: Numbered table of contents for fast information retrieval Troubleshooting Assistance: Troubleshooting and electrical service procedures combined with detailed wiring diagrams Cost Saving Potential: Save money on repair costs by performing maintenance and repairs yourself 📋 Manual Details Coverage Areas Manual Scope: All Models/Engines/Trim/Transmissions Types for the specified years Page Count Estimated Page Count: Hundreds of pages (exact count not specified, but described as comprehensive) Manual Type Type: Workshop Repair Service Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Fuel System, Cooling System, Engine Top End, Engine Lubrication System, Crankshaft/Transmission Drivetrain Systems: Clutch, Crankshaft/Transmission, Final Drive Chassis Systems: Wheels/Tires, Brakes, Suspension, Steering, Frame Electrical Systems: Electrical System, Wiring Diagrams General Information: General Information, Appendix Procedures Included Maintenance Procedures: Scheduled Maintenance, Fluid Checks and Replacements, Filter Replacements Diagnostic Procedures: Troubleshooting, Electrical System Diagnostics, Component Testing Repair Procedures: Disassembly, Assembly, Component Repair and Replacement, Engine Rebuilds Technical Information: Step-by-step repair procedures, critical specifications, diagrams, detailed information Technical Depth Depth Of Coverage: Professional-grade, comprehensive, suitable for local service/repair shops 📊 Manual Specifications File Format Digital Format: PDF Print Quality Printability: Full Printable Zoom Functionality: Zoom IN/OUT supported Binding Type Digital Binding: N/A (Electronic File) Paper Type Digital Paper Type: N/A (Electronic File) Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader & WinZip Compatibility Operating Systems: Compatible with All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, 4-valve Displacement: 249 cc (exact details to be found in manual) Bore X Stroke: 73 x 57.7 mm (typical for the model, confirm in manual) Cooling System: Liquid-cooled Performance Horsepower: Approx. 22-25 hp (estimate, exact figures in manual) Torque: Not specified, but adequate for trail riding (confirm in manual) Fuel System Fuel Delivery: Carburetor (likely Mikuni VM34 or similar, confirm in manual) Fuel Type: Unleaded gasoline (confirm octane rating in manual) 🔧 Transmission Standard Transmission Type: 5-speed constant mesh Optional Optional Transmissions: N/A (standard for this model) Features Clutch Type: Wet, multi-plate Final Drive Type: Chain drive 📐 Dimensions Exterior Overall Length: Not specified, typical for dual-sport motorcycles (confirm in manual) Overall Width: Not specified, typical for dual-sport motorcycles (confirm in manual) Overall Height: Not specified, typical for dual-sport motorcycles (confirm in manual) Weights Dry Weight: Approx. 118 kg / 260 lbs (typical, confirm in manual) Wet Weight: Not specified (confirm in manual) Fuel Capacity: 10 L / 2.6 gal (typical, confirm in manual) 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle - specific ratings not applicable) Active Features Braking System Front: Hydraulic disc brake Braking System Rear: Hydraulic disc brake Suspension Front Type: Telescopic fork Suspension Rear Type: Monocross suspension (swingarm with single shock) Passive Features Lighting System: Headlight, tail light, brake light, turn signals 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle electronics, no advanced infotainment) Driver Assistance Driver Assistance Features: N/A (No electronic rider aids like ABS or traction control on base models) Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific interval (typically 2,000-3,000 km or annually) Air Filter Cleaning: Regular inspection and cleaning/replacement recommended, especially after off-road use. Spark Plug Maintenance: Check and gap periodically, replace as needed (confirm interval in manual). Fluid Specifications Engine Oil Type: Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, confirm viscosity and API rating in manual)....