🏷️ Basic Information Identification Make: Yamaha Model: LT2 Enduro / LT3 Enduro / AT1C Enduro / AT2 Enduro / AT3 Enduro Model Variant: Enduro Series Production Years: 1971-1973 Codes Engine Displacement Range: 100cc - 175cc 👋 Introduction Market Position Target Audience: Yamaha Enduro motorcycle owners and independent repair shops. Value Proposition: Provides comprehensive, professional-level service and repair information for maintaining and restoring these classic Yamaha models. Competitive Analysis Competitors: Other aftermarket repair manuals, original Yamaha factory service bulletins (if available). Key Features Diagrams: Hundreds of pages with detailed photos & diagrams, including exploded views. Instructions: Step-by-step instructions for all procedures. Accessibility: Instant PDF download compatible with Windows and MAC. 📋 Manual Details Coverage Areas Vehicle Coverage: Yamaha LT2, LT3, AT1C, AT2, AT3 Enduro models Engine Coverage: 100cc and 175cc Enduro variants Year Coverage: 1971, 1972, 1973 Page Count Estimated Page Count: Hundreds of pages Manual Type Type: Factory Service & Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, tuning, carburetor, ignition system, lubrication, cooling. Transmission: Gearbox disassembly, assembly, maintenance, shifting mechanisms, clutch service. Electrical: Wiring diagrams, lighting, ignition coils, generators, battery, switches, troubleshooting. Chassis: Frame, suspension (front forks, rear shocks), steering system, wheels, spokes. Brakes: Front and rear brake systems, linkage, adjustment, component replacement. Fuel System: Fuel tank, petcock, fuel lines, carburetor settings and overhaul. Bodywork And Trim: Fenders, seat, handlebars, exhaust system, minor body panel adjustments. Procedures Included Maintenance: Regular servicing, lubrication schedules, filter changes, spark plug service, chain adjustment. Troubleshooting: Diagnostic guides for common starting, running, and electrical issues. Repair: Step-by-step instructions for component replacement and major overhauls. Rebuild: Detailed procedures for engine and transmission rebuilding. Technical Depth Depth: Comprehensive: Covers all aspects from basic maintenance to complete engine and transmission rebuilds. Diagnostics: Advanced diagnostic procedures for electrical and mechanical issues. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text within PDF (common for modern manuals). Print Quality Print Capability: Printable single pages or entire manual. Image Quality: Detailed photos & diagrams (quality depends on original source). Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) Licensing Usage License: Lifetime use, unlimited devices, no expiry. ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, air-cooled, piston-ported single cylinder (typical for these models). Displacement 100Cc Models: Approximately 97cc to 102cc (e.g., AT1). Displacement 175Cc Models: Approximately 171cc to 173cc (e.g., LT2/LT3). Performance Horsepower 100Cc Range: Estimated 10-15 HP (varies by model and tuning). Horsepower 175Cc Range: Estimated 15-20 HP (varies by model and tuning). Fuel System Carburetor Type: Typically Mikuni VM series single carburetor (specific size varies by model). Fuel Octane Recommendation: Typically 91 RON / 87 AKI (premium unleaded) for optimal performance and to prevent pinging, though 87 RON may be acceptable depending on tuning. Lubrication Lubrication System: Premix fuel/oil (specified ratio) or oil injection system (depending on exact model variant). 🔧 Transmission Standard Transmission Type: 5-speed constant mesh manual transmission. Optional Optional Transmission: Not typically offered for these models; all are manual. Features Clutch Type: Wet, multi-plate clutch. Gear Ratios: Detailed gear ratios will be specified within the manual for each model. 📐 Dimensions Exterior Wheelbase: Variable based on specific model, typically around 51-53 inches. Weights Dry Weight: Typically in the range of 230-260 lbs (105-118 kg). 🛡️ Safety Features Ratings Safety Ratings: No modern safety ratings available for this era of motorcycle; reliance on mechanical condition and rider skill. Active Features Active Safety: Effective braking systems (drum brakes front and rear), responsive steering. Passive Features Passive Safety: Robust frame construction, rider protection primarily dependent on protective gear. 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle technology of the era). Driver Assistance Driver Assistance Features: N/A Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Check manual for specific mileage/time intervals, typically every 1,000-2,000 miles (1,500-3,000 km) for transmission oil. Spark Plug Service: Check and clean/replace spark plug every 1,000-2,000 miles (1,500-3,000 km) or as needed based on performance. Air Filter Cleaning: Inspect and clean air filter frequently, especially in dusty conditions. Replace as needed (e.g., every 2,000-4,000 miles). Chain Lubrication And Adjustment: Lubricate and adjust chain every 500-1000 miles (800-1,500 km). Fluid Specifications Transmission Oil Type: Yamalube Gear Oil (or equivalent 2-stroke transmission oil), SAE 80W/90 (or specific viscosity recommended in manual). 2-Stroke Oil Type: High-quality 2-stroke premix oil, JASO FB or FC rated (or as specified by Yamaha for that era). Fork Oil Type: Specific fork oil viscosity (e.g., SAE 10W or 20W) and quantity to be detailed in the manual. Known Issues Common Issues: Carburetor gumming due to fuel aging, ignition coil failure, worn clutch plates, worn crank seals leading to air leaks, exhaust port blockage, kickstart mechanism wear. Electrical Issues: Poor lighting, intermittent spark, often due to aging wiring, points, or...