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Details about pressure valves in the lubrication system.
Information on the exhaust valve lifter adjustment.
Procedure for checking and adjusting tappet clearances.
Guidance on checking and setting ignition timing.
Explains needle positions for carburettor adjustment.
How to set the throttle stop screw.
Procedure for adjusting pilot mixture.
Symptoms of rich and weak mixture.
Sparking plug specifications and troubleshooting.
Steps for removing the cylinder head.
Procedure for removing the cylinder barrel.
How to remove the engine valves.
Guide to fitting new valve guides.
Process for grinding engine valves.
Checking and replacing piston rings.
Steps for removing the chaincase.
How to remove the clutch assembly.
Procedure for removing the magneto pinion.
Instructions for fitting and aligning flywheels.
Procedures for timing gears.
Adjusting the clutch control and cable.
How to adjust the front chain tension.
Method for tensioning the rear chain.
Steps for reassembling the clutch assembly.
Procedure for dismantling the gearbox.
Steps for dismantling the gear change mechanism.
Guide to reassembling gearbox and gear change.
Reassembly of the gear change mechanism.
Steps for replacing the gearbox.
Procedures for rear hub adjustment, dismantling, and reassembly.
Steps for reassembling hubs and brakes.
Details for front hub removal and replacement.
Adjusting front and rear brakes.
Process for relining brake shoes.
Adjusting the steering head for play.
Adjusting fork links and steering damper.
Reassembly of front forks and steering head.
Instructions for using a chain rivet extractor.
Method for shortening a worn rear chain.
How to repair a damaged chain.
Procedure for fitting a new rear chain.
Method for measuring chain wear.
Diagrams and explanation of the wiring system.
Information on the "MAGDYNO" type M01.
Routine maintenance for the magneto.
Troubleshooting ignition issues.
Cleaning the magneto contact breaker.
Details on the high-tension (H.T.) cable.
Details on the pick-up component.
Checking resistor and immobiliser components.
Sparking plug cleaning and adjustment.
Description of the magneto slipping clutch.
Procedure for removing the magdyno from the engine.
Steps for dismantling the magneto.
How to remove the magneto armature.
Testing the magneto armature windings.
Reassembly of magneto components.
Reassembly and testing of the slipping clutch.
Information on the Dynamo Type E3HM.
How to test the dynamo while installed.
Procedure for removing and replacing the dynamo.
Steps for dismantling the dynamo.
Details on dynamo commutator condition and cleaning.
Testing and replacing dynamo field coils.
Dynamo armature testing and replacement.
Dynamo bearing replacement procedures.
Steps for reassembling the dynamo.
Information on the cut-out and regulator unit.
How to test the regulator in position.
Cleaning the regulator's vibrating contacts.
Mechanical setting of the regulator.
Adjusting the cut-out unit.
Information on the Ammeter Type CZ27.
Testing the ammeter in position.
Removing and replacing the ammeter.
Details on Battery Type PUW7E.
How to top up the battery.
Checking the battery's state of charge.
Checking earthing connections.
Battery charging procedures.
Details on Headlamp Type DU42.
Removing the lamp front and reflector.
Setting and focusing the headlamp beam.
Details on Tail Lamp Type L-WD-MCT1.
Information on electrical cables.
Details on Lighting Switch Type RS39.
Information on Horn Type HF1235.
Method for adjusting the horn.
Details on later model Headlamp Type DU42.
Removing and operating the change-over switch.
Positions and function of the main lighting switch.
General| Brand | BSA |
|---|---|
| Model | WDM20 |
| Category | Motorcycle |
| Language | English |
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