Purpose:
To provide comprehensive repair and maintenance information for a specific range of early Honda motorcycles, enabling owners to perform dealership-level service.
Value Proposition:
Offers dealership-level technical data and instructions at a fraction of the cost of professional labor, empowering owners for self-sufficiency.
Accuracy:
Represents the same information used by authorized Honda technicians.
Usability:
Designed for both novice and experienced mechanics with clear instructions and visual aids.
Accessibility:
Instant download in a widely compatible digital format.
Coverage Areas:
Engine, Gearbox & Clutch, Cooling System, Fuel System, Braking System, Suspension, Electrical System, Body & Fixtures, Exhaust System, Wheels & Tyres, Maintenance, Technical Information & Specifications
Manual Type:
Service Repair Manual
Compatibility:
All Versions of Windows & Mac
Delivery Method:
Instant Download
Engine:
Detailed overhaul procedures, top-end rebuild, bottom-end assembly, valve adjustment, piston and cylinder inspection/replacement, crankshaft and connecting rod checks.
Transmission Clutch:
Gearbox disassembly and assembly, clutch operation, friction plate inspection and replacement, gear shifting mechanism.
Fuel System:
Carburetor adjustment, cleaning, and rebuilding; fuel tank and petcock maintenance; fuel line inspection.
Electrical System:
Ignition system (points, condenser, coil), lighting system, charging system (generator/stator, regulator/rectifier), wiring diagrams, battery maintenance.
Braking System:
Drum brake inspection, adjustment, and relining; brake lever and pedal operation.
Suspension:
Front fork disassembly, service, and oil change; rear shock absorber inspection and replacement; swingarm and bearing maintenance.
Body Fixtures:
Seat removal, fender mounting, fuel tank mounting, handlebar adjustments, control cable routing.
Wheels Tyres:
Spoke tension adjustment, wheel bearing maintenance, tire pressure recommendations, tire wear inspection.
Cooling System:
Note: These models are air-cooled. This section likely pertains to general engine temperature management or related components.
Exhaust System:
Muffler and pipe inspection, mounting bracket checks, gasket replacement.
Maintenance:
Routine checks, lubrication points, filter changes (air, oil if applicable), spark plug replacement, chain adjustment.
Troubleshooting:
Common problems and their diagnostic steps, symptom-based fault finding.
Repair Overhaul:
Complete engine rebuild, transmission overhaul, suspension component replacement, electrical system diagnostics and repair.
Adjustments:
Carburetor tuning, ignition timing, valve clearance, brake settings, clutch engagement.
Depth Level:
Comprehensive Professional Technical Service and Repair
Target Audience:
Do-it-yourselfer and Experienced Mechanic
Instruction Style:
Easy-to-follow step-by-step instructions with high-quality diagrams.
Engine Type:
Air-cooled, 4-stroke, OHC (Overhead Camshaft)
Cylinder Arrangement:
Single Cylinder
Displacement Cb100 Cl100 Sl100:
99 cc
Displacement Cb125S Cd125S Sl125:
123 cc (approx.)
Horsepower Cb100 Cl100 Sl100:
Approx. 10-11 HP
Horsepower Cb125S Cd125S Sl125:
Approx. 12-14 HP
Fuel Delivery:
Carburetor (e.g., Keihin)
Fuel Type:
Unleaded Gasoline
Bore Stroke Cb100:
49.5 mm x 50.0 mm
Bore Stroke Cb125S:
54.0 mm x 54.0 mm
Compression Ratio Cb100:
9.5:1
Compression Ratio Cb125S:
9.2:1
Valve Clearance Intake:
Refer to manual for specific values (typically cold setting)
Valve Clearance Exhaust:
Refer to manual for specific values (typically cold setting)
Oil Change:
Every 2,000-3,000 km or 6 months (check manual)
Air Filter Cleaning:
Every 2,000-4,000 km (check manual)
Spark Plug Replacement:
Every 6,000-10,000 km (check manual)
Valve Adjustment:
Every 4,000-6,000 km (check manual)
Chain Lubrication Adjustment:
Every 500-1,000 km (check manual)
Brake Fluid Type:
Not Applicable (Drum Brakes typically do not use hydraulic fluid)
Fork Oil Type:
SAE 10W (check manual for specific weight and quantity)
Carburetor Wear:
Diaphragms and jets can degrade over time, leading to poor fuel mixture and performance. Manual provides overhaul instructions.
Ignition Points Maintenance:
Points and condenser require regular cleaning and adjustment for proper ignition timing. Manual details this procedure.
Electrical Connections:
Corrosion or looseness in electrical connectors can cause intermittent faults. Manual includes wiring diagrams for tracing.
Clutch Slippage:
Worn clutch plates or incorrect adjustment can cause slippage. Manual covers inspection and replacement.
Manufacturer:
Honda Motor Company, Ltd.
Era Significance:
These models represent Honda's early efforts in small displacement, accessible motorcycles, catering to commuting and recreational riding. They built upon the success of earlier models and set the stage for future compact Honda bikes.
Production Period:
Early 1970s (specifically 1970-1971 for this manual's scope)
