Market Position:
Essential reference for owners, restorers, and mechanics of the iconic Norton 750 Commando.
Competitive Analysis:
Provides crucial part identification and interchangeability information, vital for maintaining and restoring vintage British motorcycles.
Key Features:
Detailed exploded diagrams, comprehensive part numbering system, clarity of illustration.
Engine:
Cylinder block, cylinder head, pistons, connecting rods, crankshaft, camshaft, valves, timing gears, lubrication system, oil pump, oil filter, crankcase.
Fuel System:
Carburetor(s) (e.g., Amal), fuel tank, fuel lines, fuel petcock, fuel filter.
Ignition System:
Magneto or coil ignition system components, spark plugs, ignition leads, points, condenser.
Transmission:
Gearbox internals (gear clusters, shafts, selectors), clutch assembly (plates, springs, actuating mechanism), primary drive chain and sprockets.
Frame And Suspension:
Frame sections, front fork assembly (stanchions, springs, damping components), rear shock absorbers, swingarm, bearings, bushes.
Wheels And Brakes:
Wheel rims, spokes, hubs, brake drums, brake shoes, brake levers, brake cables, associated hardware.
Electrical System:
Wiring harness, lighting (headlight, taillight, indicators), switches, battery, charging system (generator/alternator components).
Bodywork And Fittings:
Fuel tank, side panels, seat, fenders (mudguards), handlebars, control levers, footpegs, exhaust system (pipes, mufflers).
Part Identification:
Detailed illustrations of each component with corresponding part numbers and descriptions.
Assembly Disassembly Order:
Implied assembly order through logical grouping of parts in diagrams.
Fastener Identification:
Identification of standard nuts, bolts, washers, and their specific applications.
Technical Depth And Parts
Technical Depth:
High (detailed breakdown for sourcing and identifying correct replacement parts for restoration and repair).
Interchangeability:
Part numbering system supports cross-referencing correct replacement components.
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Air-cooled, four-stroke, parallel-twin
Bore X Stroke:
73mm x 89mm (typical for 750 models)
Compression Ratio:
Typically 8.5:1 or 9.0:1
Horsepower:
Approx. 50-60 bhp at 6,000-6,500 rpm (depending on variant)
Torque:
Approx. 50-55 lb-ft at 4,000-5,000 rpm (depending on variant)
Carburetion:
Typically twin Amal concentric carburetors (e.g., 30mm or 32mm).
Fuel Type:
Leaded or Unleaded petrol (depending on engine specification and era).
Braking System:
Drum brakes front and rear (some later models or options may have had disc brakes).
Lighting:
Headlight, taillight, brake light, optional turn signals.
Crash Test Ratings:
N/A - no crash test ratings existed for motorcycles of this era.
Isolastic Frame Mounting:
Commando's rubber-damped Isolastic engine mounting system reduced vibration transmitted to the rider.
Oil Change Interval:
Recommended every 3,000 miles or 6 months (consult specific service manual for exact figures).
Valve Clearance Check:
Recommended every 6,000 miles (adjust as needed).
Engine Oil Type:
SAE 20W/50 (mineral oil, often specifically formulated for classic motorcycles).
Clutch Fluid Type:
DOT 3 or DOT 4 brake fluid (for hydraulic clutches on some models, cable clutch on others).
Gearbox Oil Type:
Gear oil, SAE 80W/90 (or specific Norton recommendation).
Known Issues:
Oil leaks (especially from engine base and gearbox), gearbox selector issues, electrical gremlins, frame cracking in early models, clutch cable wear.
Common Parts To Replace:
Carburetor rebuild kits, fuel lines, oil seals, tappet seals, chain and sprockets, brake shoes, clutch plates, points and condenser.
Brand Heritage:
Norton Motorcycles is a legendary British manufacturer with a rich racing history, known for innovative designs and performance.
Model Evolution:
The Commando was introduced in 1967 and became a highly influential motorcycle, known for its performance, handling, and distinctive styling. The 750cc models were the initial iterations, evolving over time into various models like the Fastback, Interstate, and Roadster.
Production Period:
Norton 750 Commando production: circa 1967-1973.
Production Location:
Wolverhampton, England (early models); later production associated with Norton Villiers operations in England.
