🏷️ Basic Information Identification Make: Yamaha Model: TTR125LW Model Variant: TTR125LWR Year: 2003 Codes Chassis Code: 4TP1 (Likely for LW model) Engine Code: 4EX1 (Likely for TTR125LW) 👋 Introduction Market Position Category: Off-road, trail, youth motorcycle Target User: Owners and technicians performing maintenance, repair, and rebuilding of the Yamaha TTR125LW/R Competitive Analysis Competitors: Honda CRF150F, Kawasaki KLX140, Suzuki DR-Z125 Key Features Manual Advantage: Provides factory-level detail for home mechanics or independent shops, enabling cost-effective maintenance and repairs. Content Value: Reduces reliance on expensive dealership service, empowering owners with knowledge. 📋 Manual Details Coverage Areas Model Years Covered: 2003 Variants Covered: TTR125LW, TTR125LWR Page Count Total Pages: 506 Manual Type Type: Service Repair Manual Authoritative Source: Professional author, similar to factory shop manuals Language Language: Multilanguage Format Format: PDF Compatibility: Windows/Mac Delivery: Instant Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top-end, bottom-end, timing, lubrication, cooling (air-cooled) Chassis: Frame, suspension (forks, shock absorber), steering, wheels, brakes, swingarm Electrical: Ignition system, lighting, wiring diagrams, battery, charging system (stator, regulator/rectifier) Fuel System: Carburetor (Teikei Y26P or similar), fuel tank, fuel lines Exhaust System: Muffler, exhaust pipe inspection and maintenance Procedures Included Maintenance: Regular inspection, lubrication, adjustments, cleaning Troubleshooting: Diagnostic procedures for common issues Repair: Step-by-step instructions for component disassembly, repair, and reassembly Tuning: Carburetor jetting, ignition timing adjustments (if applicable) Technical Depth Depth: Comprehensive (from basic maintenance to complete engine rebuilds) Visuals: Abundant pictures and diagrams Usability: Designed for effortless completion of repairs, simple to complex 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Assumed to be text-searchable based on PDF format, aiding quick information retrieval Print Quality Printability: All pages printable Customization: Print only needed pages for workshop or home use Binding Type Type: Digital (No physical binding) Paper Type Type: Not Applicable (Digital format) ⚙️ Engine Specifications Primary Engine Type: Four-stroke, SOHC, 2-valve Displacement: 124 cc (7.57 cu. in.) Bore X Stroke: 54.0 mm x 54.5 mm (2.13 in x 2.15 in) Cooling System: Forced Air Cooling Compression Ratio: 9.5:1 Performance Horsepower: Approximately 10-12 HP (Estimate, actual may vary based on tuning and model year updates) Torque: Approximately 7-8 lb-ft (Estimate) Fuel System Carburetor Model: Teikei Y26P or similar 26mm flat slide carburetor Fuel Type: Unleaded gasoline Fuel Tank Capacity: 6.6 L (1.75 gal) Lubrication Oil Type: Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG type API service classification) Oil Capacity: 0.9 L (0.95 US qt) without oil filter change; 1.0 L (1.05 US qt) with oil filter change 🔧 Transmission Standard Type: 5-speed constant mesh Clutch Type: Wet, multiple-disc Optional Type: None Features Final Drive: Chain drive Transmission Oil Type: Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG type API service classification) Transmission Oil Capacity: 0.55 L (0.58 US qt) 📐 Dimensions Exterior Overall Length: 1,815 mm (71.5 in) Overall Width: 785 mm (30.9 in) Overall Height: 1,050 mm (41.3 in) Seat Height: 805 mm (31.7 in) Wheelbase: 1,250 mm (49.2 in) Weights Wet Weight: 95 kg (209 lbs) Dry Weight: 88 kg (194 lbs) Minimum Ground Clearance: 240 mm (9.4 in) Curb Weight: 95 kg (209 lbs) 🛡️ Safety Features Ratings Safety Certification: Not applicable (Off-road vehicle) Active Features Braking System Front: Hydraulic disc Braking System Rear: Drum Suspension Front: Telescopic fork, 8.3 inches of travel Suspension Rear: Swingarm, Monocross, 7.1 inches of travel Passive Features Tires Front: 2.75-21 45P Tires Rear: 100/100-18 59P 💡 Technology Features Infotainment System: Not Applicable (Basic dirt bike) Driver Assistance Features: Not Applicable (Basic dirt bike) Connectivity Features: Not Applicable (Basic dirt bike) 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000 km (1,800 mi) or 6 months, whichever comes first. (Consult manual for exact, potentially shorter intervals for severe use) Air Filter Cleaning: Every 1,000 km (600 mi) or more frequently in dusty conditions. Spark Plug Inspection: Every 3,000 km (1,800 mi) Valve Clearance Check: Every 10,000 km (6,000 mi) or 2 years. Fluid Specifications Engine Oil: Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG) Transmission Oil: Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG) Brake Fluid: DOT 3 or DOT 4 (for hydraulic front brake, confirm in manual) Known Issues Carburetor Clogging: Common in older or infrequently used off-road bikes due to fuel sitting in the bowl. The manual will detail cleaning and jetting procedures. Chain And Sprockets Wear: Normal wear item for off-road bikes; manual provides adjustment and replacement guidelines. Suspension Seals: Fork seal leaks can occur with heavy use; manual details fork maintenance and seal replacement. 📚 Vehicle History Brand Heritage Manufacturer: Yamaha Motor Corporation Heritage Focus: Known for innovation in motorcycles, including off-road and performance vehicles. Model Evolution Introduction Year: The TTR series began in the late 1990s, with the 125cc model becoming a staple for youth and beginner trail riding. Key Changes For...