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Lists the available BSA motorcycle models covered by this manual, including D1, D3, and D5.
Details the operation of levers, switches, and the throttle grip on the handlebars.
Explains the function and operation of the gearchange and rear brake pedals.
Provides key technical details on engine capacity, bore, stroke, and transmission gear ratios.
Lists fuel tank capacity, gearbox oil volume, and wheel specifications like rim and tyre sizes.
Covers essential pre-ride checks and familiarization with machine controls for new owners.
Guides on starting the engine, moving off, changing gears, and stopping the motorcycle.
Advises on proper engine care and operation during the initial 1,000-1,500 miles.
Outlines required maintenance tasks based on time intervals and mileage.
Explains petroil mixture requirements and lubrication system details.
Details how to set the contact breaker points for correct ignition timing.
Describes the process of removing carbon deposits from the engine and its benefits.
Step-by-step guide for removing the cylinder barrel and head for maintenance.
Instructions for examining the piston and piston rings for wear and deposits.
Methods for cleaning carbon deposits from the cylinder head and exhaust ports.
Procedure to test the big-end bearing for play and signs of wear.
Guide on inspecting, cleaning, and setting the gap of the sparking plug.
Identification and description of key parts of the carburettor.
Instructions for cleaning and maintaining the oil-dip type air cleaner.
Guidance on the correct use of the carburettor strangler for starting.
Lists recommended oils, greases, and petrol-oil mixing ratios for different conditions.
Steps for lubricating and adjusting the primary and rear chains.
Procedure for adjusting the clutch lever free play for optimal engagement.
Instructions for draining and refilling the gearbox with fresh oil.
Steps for safely removing and refitting the front and rear wheels.
Method for adjusting the rear chain to the correct tension.
How to adjust the front and rear brake controls for effective braking.
Guide on replacing worn brake linings with new ones.
Instructions for lubricating the telescopic front fork sliding members.
Procedure for removing play and ensuring smooth steering head operation.
Steps for dismantling and servicing the rear suspension units.
Guidance on checking battery electrolyte levels and specific gravity readings.
Maintenance advice for the alternator and rectifier for charging the battery.
Instructions for operating the motorcycle without a battery in emergencies.
Steps for safely removing the engine generator unit using specific tools.
Details on replacing headlamp bulbs and adjusting the electric horn.
Electrical schematic illustrating the direct lighting system connections.
Electrical schematic illustrating the battery lighting system connections.
Information on obtaining original equipment manufacturer (OEM) parts and online schematics.
General| Bore x Stroke | 52 mm x 58 mm |
|---|---|
| Ignition | Magneto |
| Transmission | 3-speed manual |
| Front Suspension | Telescopic forks |
| Rear Suspension | Rigid |
| Front Brake | Drum |
| Rear Brake | Drum |
| Engine Type | Two-stroke single |
| Fuel Tank Capacity | 2.5 gallons |
| Displacement | 123 cc |
| Weight | 198 lbs (90 kg) |
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