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BSA B31 - User Manual

BSA B31
41 pages
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Summary

Motorcycle Overview and Controls

Technical Data

Key specifications and data for different motorcycle models.

Controls and Operation

Explains handlebar, foot, and general controls for riding.

Starting and Driving Procedures

Guidance on starting the engine and basic driving operations.

Engine Care and Maintenance

Running-in and Lubrication System

Instructions for breaking in a new engine and its lubrication system.

Scheduled Maintenance

Routine service tasks at weekly, 1,000, and 2,000 mile intervals.

Adjustments and Tuning

Chassis and Steering Adjustments

Procedures for wheel, fork, and steering head adjustments.

Engine Timing and Valve Clearance

Adjusting ignition timing and valve clearances.

Clutch, Chain, and Brake Adjustments

Adjusting clutch, chains, and brake systems for optimal performance.

Carburetter and Spark Plug Service

Carburettor adjustment, plug maintenance, and air cleaner cleaning.

Engine Overhaul Procedures

Procedures for cylinder head removal, valve, piston, and ring maintenance.

Suspension and Model Specifics

Adjusting suspension and specific instructions for competition/Gold Star models.

Electrical System and Wiring

Electrical System Maintenance

Care and servicing for battery, dynamo, and magneto.

Lamps and Wiring Diagrams

Headlamp adjustments, bulb replacement, and wiring schematics.

BSA B31 Specifications

General IconGeneral
Engine TypeSingle-cylinder, four-stroke
Displacement348 cc
Bore x Stroke71 mm x 88 mm
Transmission4-speed manual
Front SuspensionTelescopic forks
BrakesDrum brakes front and rear
IgnitionMagneto
Compression Ratio6.5:1
Power Output17 hp @ 5, 500 rpm
Fuel SystemAmal Carburettor
Wheelbase54 inches
Top Speed75 mph
Fuel Capacity3.5 gallons (13.2 liters)

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