🏷️ Basic Information Identification Make: Hodaka Model: Singles (90cc & 125cc) Engine Type: Single Cylinder Codes Product Name: HODAKA 90CC 125CC SINGLES Workshop Repair Manual All 1964-1975 ModelS COVERED 👋 Introduction Market Position Segment: Vintage Off-Road Motorcycles (Enduro, Trail) Competitive Analysis Alternatives: While original factory service manuals for Hodaka models are rare, this comprehensive workshop manual serves as the definitive guide for owners of these classic machines. Key Features Ease Of Use: Features easy-to-read exploded views and diagrams for clear identification and assembly/disassembly. Content Richness: Packed with illustrations, diagrams, specifications, step-by-step instructions, pictures, and detailed procedures. 📋 Manual Details Coverage Areas Coverage Scope: All 1964-1975 Hodaka 90cc and 125cc Single Cylinder models Page Count Estimated Page Count: N/A (Digital format, variable based on specific content, but comprehensive) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF (Instant Download) 📖 Manual Coverage Systems Covered Engine: Detailed coverage of engine disassembly, assembly, inspection, and repair for both 90cc and 125cc single-cylinder engines. Transmission: Coverage for gearbox inspection, maintenance, and repair, including gear selection and clutch mechanism. Fuel System: Carburetor tuning, cleaning, and overhaul; fuel tank and petcock maintenance; fuel line inspection. Ignition System: Magneto ignition system details, spark plug specifications, timing adjustments. Electrical System: Wiring diagrams, lighting system maintenance, charging system (magneto/coil) checks. Suspension: Front fork (telescopic) maintenance, adjustment, and seal replacement; rear shock absorber and swingarm inspection. Brakes: Drum brake adjustment, lining inspection, and cable maintenance. Wheels And Tires: Spoke wheel maintenance, bearing inspection, and tire pressure recommendations. Frame And Bodywork: Frame inspection, minor bodywork repair guidance, seat and fender maintenance. Procedures Included Routine Maintenance: Oil changes, air filter cleaning/replacement, chain adjustment, spark plug service, general lubrication. Engine Rebuild: Complete engine overhaul procedures, including piston, rings, cylinder, crankshaft, and bearing replacement. Carburetor Adjustment: Step-by-step instructions for tuning and adjusting the carburetor for optimal performance. Troubleshooting: Diagnostic guidance for common performance issues and component failures. Disassembly Reassembly: Detailed, illustrated steps for taking apart and putting back together all major components. Cable Replacement: Instructions for replacing throttle, clutch, and brake cables. Suspension Overhaul: Front fork seal replacement, oil changes, and rear shock inspection. Technical Depth Depth: Comprehensive workshop-level repair and maintenance, suitable for both experienced mechanics and dedicated DIY enthusiasts. 📊 Manual Specifications File Format PDF Quality: High-resolution, searchable PDF with clear text and legible diagrams. Print Quality Printable: Yes, printable pages for at-the-bench use. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Bore Stroke 90Cc: Typical ~49mm x 49.5mm (varies slightly by specific model) Bore Stroke 125Cc Bore Stroke 125Cc: Typical ~56mm x 50mm (varies slightly by specific model) Performance Horsepower 90Cc Approx: 5-7 HP (approximate, depends on tuning and model) Horsepower 125Cc Approx: 8-12 HP (approximate, depends on tuning and model) Torque Curve: Focus on low-to-mid range torque typical of off-road engines of the era. Fuel System Carburetor Type: Typically Mikuni or similar Japanese carburetors (e.g., VM series), specific sizes vary by model. Fuel Type: Unleaded gasoline (recommendations for octane rating will be in manual, likely 87-91 octane). Engine Internals Piston Type: Cast aluminum, two-stroke design, typically with one or two compression rings. 🔧 Transmission Standard Type: Constant mesh, sequential, foot-shifted gearbox. Optional Clutch Type: Wet multi-plate, cable-actuated clutch. Features Gear Ratios: Specific gear ratios for each model variant will be detailed in the manual. Transmission Fluid: Dedicated gearbox oil or engine oil (depending on specific design), specifications will be provided. 📐 Dimensions Exterior Wheelbase: Varies by model, but generally compact for maneuverability. Weights Dry Weight Approx: Typically in the range of 150-180 lbs (68-82 kg). 🛡️ Safety Features Ratings Crash Safety Focus: N/A (Vintage motorcycle, focus is on mechanical reliability and rider skill). Active Features Braking System: Drum brakes front and rear. Proper adjustment and maintenance are critical. Passive Features Lighting: Basic headlight, taillight, and stoplight. Ensuring these are functional is a safety priority. 💡 Technology Features Infotainment Features: N/A (Mechanical motorcycle from the 1960s/70s). Driver Assistance Features: N/A (Mechanical motorcycle from the 1960s/70s). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 1000-1500 miles or annually; check manual for specifics. Spark Plug Check: Inspect at 500-mile intervals, clean or replace as needed. Chain Lubrication Adjustment: Lubricate every 500 miles or after riding in wet conditions; adjust slack at the same interval. Fluid Specifications Engine Oil Type: Two-stroke pre-mix gasoline/oil (ratio specified by model, typically 20:1 or 25:1) and separate gearbox oil (viscosity specified in manual, likely SAE 80 or 90). Gearbox Oil Capacity: Capacity will be specified in the manual, typically around 0.5 to 1 liter. Known Issues Carburetor Clogging: Common in older motorcycles due to fuel degradation; requires regular cleaning. Ignition Coil Failure: Magneto ignition components can degrade over time, requiring testing and potential replacement. Seal Leaks: Front fork seals and engine seals can dry...