🏷️ Basic Information

Make:

Norton

Model:

Commando

Model Variant:

All Models Covered (1970 onwards)

👋 Introduction

Positioning:

Essential resource for owners and enthusiasts of the iconic Norton Commando motorcycle, providing the definitive factory-level repair and maintenance information.

Comparison:

Distinguishes itself through its comprehensive coverage of all 1970-on models and the inclusion of a detailed parts breakdown, offering superior value compared to fragmented or incomplete manuals.

Feature 1:

Official factory documentation ensuring accuracy and completeness.

Feature 2:

Over 300 pages of detailed technical information.

Feature 3:

Includes a complete parts list and breakdown for easy part identification and ordering.

Feature 4:

PDF format allows for easy digital access and selective printing.

Feature 5:

Covers all Norton Commando models from 1970 onwards, providing broad applicability.

📋 Manual Details

Engine:

Complete overhaul, tuning, troubleshooting, specifications

Transmission:

Gearbox servicing, clutch operation, maintenance, specifications

Chassis Suspension:

Front forks, rear shock absorbers, frame, swingarm, wheel bearings

Brakes:

Front and rear brake system maintenance, adjustments, fluid changes

Electrical System:

Ignition system, lighting, charging system, wiring diagrams, troubleshooting

Fuel System:

Carburetor tuning, fuel tank, petcock, fuel lines

Bodywork Trim:

Fender, tank, seat, instrument panel, fairings (if applicable)

Parts Breakdown:

Comprehensive parts diagrams and lists for ordering and reassembly

Pages:

Over 300

Type:

Factory Workshop Manual & Parts Breakdown

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine Management:

Ignition timing, valve adjustment, piston and ring replacement, cylinder head reconditioning

Drivetrain:

Clutch adjustment and replacement, gearbox disassembly and assembly, chain and sprocket maintenance

Suspension Steering:

Fork seal replacement, damper servicing, steering head bearing adjustment, wheel balancing

Braking System:

Brake pad inspection and replacement, caliper servicing, brake line maintenance, bleeding procedures

Electrical Diagnostics:

Wiring diagram interpretation, troubleshooting common electrical faults, alternator and regulator testing, battery maintenance

Carburetion Fuel Delivery:

Carburetor jetting, float level adjustment, cleaning and rebuilding, fuel pump operation

Routine Maintenance:

Oil changes, filter replacements, chain lubrication and adjustment, spark plug checks

Troubleshooting Guides:

Systematic fault finding for common engine, electrical, and mechanical issues

Major Overhaul:

Complete engine rebuild, gearbox disassembly and reassembly, frame inspection and repair

Part Replacement:

Step-by-step instructions for replacing key components

Alignment Adjustments:

Carburetor synchronization, brake lever adjustment, clutch cable adjustment

Depth:

Comprehensive, covering everything from basic servicing to full engine and gearbox rebuilds, including detailed specifications and tolerances

📊 Manual Specifications

PDF Quality:

High-resolution, printable, and searchable PDF document

Printability:

Designed for home printing, allowing users to print specific sections as needed

Binding:

Digital PDF - print on demand (no physical binding)

Paper Recommendation:

Recommended for printing on durable, high-quality paper for workshop use

⚙️ Engine Specifications

Engine Type:

Air-cooled, parallel-twin, pushrod OHV

Displacement:

745cc (Standard for most 1970+ models; variations exist)

Bore X Stroke:

Approx. 73mm x 89mm (varies slightly by model and revision)

Compression Ratio:

Typically 8.5:1 or 9.0:1 (depending on model and tuning)

Horsepower Peak:

Around 50-56 bhp at 6,000-6,500 rpm (model dependent)

Torque Peak:

Around 44-48 lb-ft at 5,000 rpm (model dependent)

Carburetion:

Typically Amal Concentric (e.g., 30mm or 32mm) or possibly Dell'Orto

Fuel Type:

Unleaded petrol (with appropriate octane rating, e.g., 95 RON or higher)

🔧 Transmission

Gearbox Type:

4-speed constant mesh, right-foot shift (later models may have left-foot shift conversions)

Clutch Type:

Multi-plate, wet, cable-operated

Gear Ratios:

Specific ratios detailed in manual, varying by model and final drive sprocket

Gearbox Oil Spec:

See manual for specific recommendations (e.g., SAE 20W/50 motorcycle-specific oil)

📐 Dimensions

Wheelbase:

Approx. 56 inches (1422 mm) (varies by model)

Seat Height:

Approx. 30-32 inches (762-813 mm) (model dependent)

Dry Weight:

Approx. 375-410 lbs (170-186 kg) (model dependent)

🛡️ Safety Features

Crash Test Results:

N/A for this era of motorcycle; focus on rider safety through proper maintenance and operation.

Braking System:

Disc brakes (front and often rear on later models), drum brakes on earlier variants.

Suspension:

Telescopic front forks (e.g., leading axle or trailing link), twin rear shock absorbers with adjustable preload.

Frame Integrity:

Robust steel frame construction (e.g., 'Featherbed' frame variations).

💡 Technology Features

Infotainment System:

N/A (Classic motorcycle, focus is mechanical and performance).

Assistance Features:

N/A (Classic motorcycle).

Connectivity Options:

N/A (Classic motorcycle).

🔧 Maintenance

Oil Change:

Every 2,000-3,000 miles or annually (refer to manual for exact recommendations).

Valve Adjustment:

Every 3,000-4,000 miles or annually.

Chain Lubrication Adjustment:

Every 500 miles or after washing/rain.

Spark Plug Check:

Every 3,000-4,000 miles.

Engine Oil:

SAE 20W/50 motorcycle-specific (API SE/SF recommended) - consult manual for precise grade.

Brake Fluid:

DOT 3 or DOT 4 (for disc brake systems, check manual for specific type).

Gearbox Oil:

Refer to manual; typically the same as engine oil or a dedicated motorcycle gearbox oil.

Engine Oil Leaks:

Common at crank seals, gearbox output shaft, and cylinder head gasket.

Primary Chain Tensioner:

Wear and potential failure can lead to noise and timing issues.

Carburetor Tuning Instability:

Amal carbs can be sensitive to adjustment and altitude.

Electrical Gremlins:

Aging wiring, Lucas electrical components (though Commando electrics were an improvement over earlier Nortons) can be a source of intermittent issues.

Swingarm Bushings:

Wear can lead to poor handling and imprecise steering.

📚 Vehicle History

Heritage:

Norton is a legendary British motorcycle manufacturer with a rich racing history, dating back to the early 20th century. Known for innovation and performance.

Evolution:

The Commando, introduced in 1967, evolved through numerous iterations, including the Fastback, Roadster, Interstate, and John Player Special models. Key developments included engine upgrades (e.g., 828cc kits), frame improvements (e.g., Combat engine), and brake enhancements.

Production Period:

1967-1977 (original production run); revived in later years under different ownership.

Manufacturing Location:

England (various Norton factories)

🏆 Awards & Recognition

Model Recognition:

The Norton Commando is widely regarded as a British icon and a landmark motorcycle of its era, celebrated for its performance, handling (especially with the Featherbed frame), and distinctive styling. It consistently ranks highly in 'greatest motorcycle' lists.

Performance Reviews:

Contemporary reviews often praised its strong engine, good braking (for the time), and excellent handling characteristics, particularly when compared to its contemporaries.

Manual Certification:

Factory Authorized Content