This manual covers the Enduro motorcycles, specifically the 100cc and 175cc models produced between 1971 and 1973. These dual-purpose trail motorcycles are recognized for their rugged design, reliable two-stroke engines, and capable off-road performance, making them popular among enthusiasts for both riding and restoration. The Enduro series represented a successful entry into the burgeoning off-road and dual-purpose market of the early 1970s, offering a blend of practicality and adventure. This comprehensive Factory Service Repair Workshop Manual provides detailed information essential for the maintenance, repair, and overhaul of your Enduro. It covers critical systems including the engine, transmission, chassis, brakes, and electrical system, offering step-by-step procedures for routine service, component replacement, and troubleshooting. With factory-level detail, this manual serves as an indispensable resource for owners and technicians aiming to preserve the performance and longevity of these classic machines. 🏷️ Basic Information Identification Make: Yamaha Model: Enduro Model Range: 100cc & 175cc Production Years: 1971-1973 Codes Manual Product Name: Yamaha 100 175 Enduro Motorcycles 1971-1973 Service Repair Workshop Manual Pdf 👋 Introduction Market Position Category: Dual-purpose / Trail Motorcycle Target Audience: Enthusiasts and owners seeking to maintain, repair, or restore their vintage Yamaha Enduro motorcycles. Competitive Analysis Competitors Era: Honda SL series, Suzuki TS series, Kawasaki F series Key Features Vehicle Appeal: Rugged design, reliable two-stroke engines, capable off-road performance, lightweight for their class. Manual Value Proposition: Provides essential technical data for keeping these classic machines running optimally, crucial for preserving their value and functionality. 📋 Manual Details Coverage Areas Covered Models: Yamaha 100 Enduro, Yamaha 175 Enduro Covered Years: 1971, 1972, 1973 Page Count Estimated Page Count: Extensive (typically 300+ pages for comprehensive factory manuals of this era) Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Top-end (cylinder, piston, rings), Bottom-end (crankshaft, connecting rod, bearings), Carburetion, Ignition system (points, coil, timing), Lubrication system, Cooling system (air-cooled specific considerations) Transmission Drivetrain: Clutch operation and adjustment, Gearbox internal components and servicing, Shift mechanism, Final drive (chain maintenance, sprockets) Chassis Suspension: Front forks (oil changes, seal replacement, spring specifications), Rear shock absorbers (rebuild, adjustment), Swingarm lubrication and bearing service, Frame inspection and repair considerations Brakes: Drum brake system overhaul (shoe replacement, drum cleaning, linkage adjustment), Brake cable maintenance and adjustment Electrical System: Wiring diagrams, Lighting system (headlight, taillight, indicators), Horn operation, Battery maintenance and specifications, Charging system (magneto/alternator output) Fuel System: Fuel tank servicing, Fuel lines, Fuel petcock operation and repair, Carburetor disassembly, cleaning, adjustment, and jetting specifications Controls: Throttle cable adjustment, Clutch cable adjustment, Brake lever and pedal adjustment, Handlebar and control lever replacement Bodywork Trim: Fender removal and installation, Seat removal and maintenance, Fuel tank mounting and removal, Side cover removal and installation Procedures Included Maintenance Procedures: Regular service checks, Oil changes and filter replacements (if applicable), Spark plug inspection and replacement, Air filter cleaning and replacement, Chain lubrication and adjustment, Tire pressure checks, General cleaning and lubrication Repair Procedures: Engine top-end rebuild (piston, rings, cylinder), Carburetor overhaul and tuning, Fork seal replacement, Brake shoe replacement, Cable replacement, Basic electrical troubleshooting and component replacement Troubleshooting Guides: Diagnostic flowcharts for common running issues (e.g., hard starting, poor performance), Electrical system fault finding, Carburetion problems and solutions Disassembly Reassembly: Step-by-step instructions for major component removal and installation, Detailed diagrams for complex assemblies Technical Depth Depth: Comprehensive factory-level detail, suitable for both home mechanics and professional technicians. Covers routine maintenance, diagnostics, repairs, and overhauls. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Searchable: Typically Yes (depending on PDF creation) Print Quality Quality: High-resolution scans of original factory documents, ensuring clarity of text and diagrams. Binding Type Type: Digital Download (PDF) Paper Type Original Medium: Factory printed manual (scanned into PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, air-cooled Cylinder Configuration: Single-cylinder Displacement 100Cc: Approx. 97cc Displacement 175Cc: Approx. 171cc Performance Horsepower 100Cc Approx: 10-12 HP (varies by specific model variant and tuning) Horsepower 175Cc Approx: 15-18 HP (varies by specific model variant and tuning) Fuel System Carburetor Type: Mikuni (common), Keihin (possible) Fuel Type: Unleaded gasoline with two-stroke oil mixture (e.g., 20:1 or 25:1, refer to manual for exact ratio) Fuel Delivery: Carburetor, gravity feed from fuel tank Ignition Ignition System: CDI (Capacitor Discharge Ignition) or Magneto with points and condenser Spark Plug Type Example: NGK B8ES (example, consult manual for specific type and gap) 🔧 Transmission Standard Transmission Type: Constant mesh, 5-speed sequential manual gearbox Optional Optional Transmissions: Not applicable for this model range Features Clutch Type: Wet multi-plate clutch Gear Ratios: Specific ratios detailed in the manual (crucial for performance tuning) Transmission Oil Type: Yamalube 2-stroke oil or equivalent, mixed with fuel (engine oil lubricates gearbox internals, refer to manual for specific gearbox oil if separate reservoir) 📐 Dimensions Exterior Wheelbase Approx 100: Approx. 1240 mm...