Do you have a question about the BSA A65 Lightning and is the answer not in the manual?
Location of engine and frame numbers for identification.
Details on replacement parts, repairs, and exchange service in the UK.
BSA parts distribution through national dealer network.
Claiming under guarantee through the selling dealer.
Dealers provide major repair services.
Availability of re-conditioned BSA units.
List of manufacturers for key motorcycle components like carburettors and tyres.
Summary of general data for various A65 and A50 models.
Piston specifications and dimensions.
Crankshaft details and specifications.
Specifications for wheels, brakes, and tyres.
Recommended torque wrench settings.
Scheduled maintenance tasks for different mileage intervals.
Explanation of the engine's dry sump lubrication system.
Procedure for changing engine oil and cleaning oil filters.
Diagram showing an exploded view of the 500 and 650 c.c. engine.
Procedure for engine decarbonisation.
Procedure for removing the cylinder head.
Procedure for checking and replacing piston rings.
Procedure for setting ignition timing using flywheel peg.
Methods and tools for checking frame alignment.
Procedure for removing the swinging arm.
Procedure for removing and replacing rear shock absorbers.
Procedure for checking and adjusting wheel alignment.
Procedure for adjusting steering head bearings.
Procedure for removing front fork legs.
Procedure for checking and straightening front forks.
Steps for removing and replacing the front wheel with quick-release hub.
Guidance on maintaining tyre pressure and wear.
Information on the charging system, including battery and dynamo.
Explanation of Zener diode function in charge control.
Tools required for engine servicing.
Special tools for front fork maintenance.
Tables for converting inches and decimals to millimetres.
Explanation of the BSA exchange service process.
List of reconditioned units available through the exchange service.
List of BSA stockists in the United Kingdom with addresses and phone numbers.
List of BSA distributors worldwide with addresses.
| Engine type | Air-cooled, four-stroke, parallel twin |
|---|---|
| Displacement | 654 cc |
| Bore x Stroke | 75 mm x 74 mm |
| Transmission | 4-speed |
| Final Drive | Chain |
| Front suspension | Telescopic forks |
| Front brake | Drum |
| Rear brake | Drum |
| Fuel System | Carburetor |
| Ignition | Coil ignition |
| Frame | Tubular steel duplex |
| Rear suspension | Twin shocks |
| Top Speed | 115 mph |