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Detailed technical data for engine, transmission, wheels, and tyres.
Carburettor settings and overall machine dimensions.
Identification, function, and adjustment of all controls.
Procedures for starting, driving, and using the gearbox.
Essential steps for breaking in a new motorcycle engine.
Tasks for weekly, 1,000, 2,000, 5,000, and 10,000 mile intervals.
System overview, oil change, and filter cleaning procedures.
Tappet, contact breaker, and ignition timing adjustments.
Decarbonisation, cylinder removal, and spark plug maintenance.
Adjusting the carburettor and servicing the air cleaner.
Lubrication, clutch, primary chain, and gearbox maintenance.
Wheel servicing, brake adjustment, and shoe replacement.
Front wheel removal, chain tensioning, and wheel alignment.
Maintenance of forks, steering, suspension units, and frame.
Overview of rectifier, battery, alternator, and general system.
Headlamp beam setting, bulb replacement, and horn.
Interpretation of wiring diagrams and general operating advice.
Practical advice for common issues and operation.
Lists of B.S.A. stockists and proprietary equipment manufacturers.
General| Bore x Stroke | 67 mm x 70 mm |
|---|---|
| Transmission | 4-speed manual |
| Front Suspension | Telescopic forks |
| Brakes | Drum brakes front and rear |
| Carburetor | AMAL Monobloc |
| Engine Type | Single cylinder, 4-stroke |
| Power Output | 15 bhp @ 6500 rpm |
| Rear Suspension | Twin shocks |
| Fuel Capacity | 2.5 gallons |
| Displacement | 249 cc (15.2 cu in) |
| Frame Type | Steel, single downtube |
| Wheelbase | 52 in (1321 mm) |
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