Target Audience:
Norton owners, independent workshops, motorcycle enthusiasts undertaking repairs
Value Proposition:
Provides professional-grade repair and maintenance information equivalent to what technicians use, enabling DIY repairs and reducing reliance on expensive specialist services.
Delivery Method:
Instant download
Ease Of Use:
Easy to read PDF format, accessible on multiple operating systems
Overall Coverage:
Comprehensive A-Z service and repair
Model Coverage:
All Mk 3 variants 1975 onwards
Estimated Page Count:
Likely 200-300 pages (typical for professional workshop manuals of this era, though not explicitly stated)
Type:
Service Repair Workshop Manual
Engine:
Complete engine overhaul, rebuild procedures, tuning
Clutch:
Clutch inspection, adjustment, replacement
Transmission:
Gearbox disassembly, assembly, troubleshooting
Cooling Systems:
N/A (Air-cooled engine)
Fuel System:
Carburetor tuning, fuel tank, fuel lines, petcock maintenance
Exhaust System:
Exhaust pipe and silencer maintenance
Ignition System:
Ignition timing, coil, points, condenser testing and adjustment
Electrical System:
Wiring harness, lighting, charging system (alternator/generator), battery, starter
Brakes:
Front and rear brake systems, hydraulic components, adjustment
Wheels And Tires:
Wheel balancing, tire replacement, spoke tensioning
Steering:
Steering head adjustment, fork maintenance
Suspension:
Front forks (Telescopic), rear shock absorbers, swingarm maintenance
Frame And Bodywork:
Frame inspection, body panel repair and fitting, seat maintenance
Wiring Diagrams:
Detailed electrical schematics
Diagnostic Procedures:
Fault finding and troubleshooting guides
Maintenance Procedures:
Regular servicing, lubrication, adjustments
Repair Procedures:
Detailed step-by-step repair instructions for all major components
Disassembly Assembly:
Complete breakdown and reassembly of engine, gearbox, and other systems
Tuning Adjustments:
Carburetor, ignition, and chassis adjustments
Depth:
Professional quality, covering all major repair topics in great detail
Visuals:
Includes high-quality pictures and diagrams
Compatibility:
Works on all operating systems (Windows 95 onwards, Mac)
Searchability:
Likely text-searchable within the PDF (standard for professional manuals)
Quality:
Professional quality information, printable
Format Detail:
Digital PDF format, not a physical book
Format Detail:
N/A (Digital format)
Type:
Norton Commando 850cc Vertical Twin
Configuration:
Air-cooled, 360-degree crankshaft, parallel-twin
Bore X Stroke:
77 mm x 90 mm (typical for 828cc, 850cc often around 77mm bore)
Displacement:
828 cc (officially marketed as 850cc)
Horsepower Typical:
Approximately 50-55 bhp at 6200 rpm (varies with tuning and specific model year)
Torque Typical:
Approximately 50-53 ft-lbs at 4500 rpm
Carburetion:
Typically twin Amal Concentric carburetors (e.g., 30mm or 32mm)
Fuel Type:
Unleaded petrol (with octane rating suitable for classic engines, e.g., 95 RON)
Type:
Contact breaker points (Lucas ignition typically)
Capacity Typical:
Approximately 4.5-5 pints (2.25-2.5 litres)
Specification:
SAE 20W/50 (classic motorcycle oil with appropriate ZDDP content)
Oil Change Interval:
Typically every 2,000-3,000 miles or annually, whichever comes first.
Valve Clearance Check:
Typically every 2,000-3,000 miles
Chain Adjustment:
Regularly, as slack develops (check for ~1/2 inch play)
Brake Fluid:
DOT 4 (for hydraulic systems)
Gearbox Oil:
Gearbox oil, e.g., SAE 80 or 90 gear oil (refer to specific manual recommendations)
Engine Mounting:
Early Commandos suffered from "wobble" due to frame flexing. The Mk 3's "Isolation Mount" system aimed to rectify this, but proper setup is crucial.
Electrical Reliability:
Lucas components, while iconic, were sometimes prone to failure. Wiring maintenance and upgrades are common.
Gearbox Engagement:
Occasional issues with gear engagement or false neutrals can occur; proper lubrication and adjustment are key.
Carburetor Tuning:
Amal carbs can be finicky and require regular adjustment for optimal performance.
Manufacturer:
Norton Motorcycle Company (UK)
Commando Lineage:
The Commando was Norton's last major motorcycle model before the company's financial troubles. The Mk 3 was a significant revision, notably featuring electric start as standard and the."Isolation Mount" engine mounting system.
Production Period:
Norton Commando production ran from 1968 to 1977. The Mk 3 was introduced in 1973.
