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A.J.S. 20 De-Luxe - User Manual

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INSTRUCTION BOOK
A
A
A
J
S
350
Model
16
500
Model
18
SINGLE CYLINDER
MODEL
SPINGTWINS
Standard 20 and 20 De-Luxe (500 c.c.)
Standard 31 and 31 De-Luxe (650 c.c.)
CS and CSR Models (650 c.c)
Issued by :
A.J.S. MOTOR CYCLES : LONDON S.E.18
Proprie tors : ASSOCIATED MOTOR 'CYCLES LTD.

Table of Contents

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Summary

Data

Model Identification and Capacities

Lists model identities, engine capacities, and fluid capacities for various parts.

Cylinder and Carburettor Specifications

Details cylinder bore sizes and carburettor settings for different models.

Controls

Handlebar Controls

Covers throttle, air, clutch, ignition, horn, dipping, and dummy grip on handlebars.

Driving

Starting the Engine from Cold

Procedures for starting the engine when cold on various models.

Lubrication

Lubricants to Use

Recommends oils and greases for engine, gearbox, hubs, forks, and chains.

Oil Systems and Circulation

Explains oil flow, checking circulation, pump function, and system details for singles/twins.

Oil Tank and Filters

Covers oil tank capacity, maintenance, and the different oil filters.

Engine Oil Adjustments and Cleaning

Oil Filter Maintenance

Gear Box Lubrication

Periodical Maintenance

Daily and Weekly Checks

Routine checks performed daily and weekly for optimal machine condition.

500 and 1,000 Miles Maintenance

Key maintenance tasks at 500 and 1,000 mile intervals.

Engine Service

Tappet Adjustment-Singles

Step-by-step guide to adjusting tappets on single cylinder models.

Rocker Adjustment-Twins

Decarbonisation

Single Cylinder Models: Cylinder Head Removal

Procedure for removing the cylinder head on single cylinder models.

Valve and Guide Service

Valve Replacement

Valve Grinding

Cylinder Head Replacement (Singles)

Cylinder Barrel and Piston Removal

Piston and Cylinder Barrel Fitting

Valve Timing

Ignition Timing

Check Contact Breaker Gap

How to check and adjust the contact breaker gap for ignition timing.

Setting the Ignition Timing

Decarbonisation-Twins

Cylinder Head Removal (Twins)

Steps to remove cylinder heads on twin cylinder models for decarbonisation.

Valve and Guide Removal

Ignition Timing-Twins (Magneto Models)

Ignition Timing-Alternator Twins

Valve Timing-All Twin Models

Carburetter Service

Carburetter Adjustment

Guidance on adjusting the carburettor for optimal engine performance.

Carburetter Tuning Information

Transmission Service

The Gear Box

Overview of the gearbox, its speeds, and operation.

Gear Box Cover Procedures

Chaincase Cover Procedures

Rotor and Engine Sprocket Service

Clutch Operating Mechanism Adjustment

Clutch Spring Adjustment

Gear Box Dismantling

Cam Plate Service

Kick Starter Assembly Service

Front Chain Adjustment

Rear Chain Adjustment

Fork & Frame Service

Steering Head Adjustment

How to properly adjust and test the steering head bearings.

Front Forks (Teledraulic)

Overview of the Teledraulic front forks and their components.

Front Fork Assembly Procedures

Complete Front Fork Assembly Removal

Instructions for removing the entire front fork assembly.

Wheels and Brakes

Front Wheel Service

Procedures for removing, refitting, and servicing the front wheel.

Rear Wheel Service

Steps for removing and refitting rear wheels (quick-detachable and standard).

Wheel Bearings and Adjustment

How to service and adjust wheel bearings and dismantle front wheel bearings.

Front Brake Adjustment

Rear Brake Adjustment

Electrical Service

Lucas A.C. Lighting-Ignition Unit

Details of the Lucas AC lighting and ignition system, including alternator.

Running and Starting Procedures

Covers normal operation, emergency starting, and charging procedures.

Electrical Service-Magneto Models

Magneto Ignition System

Details on the magneto ignition system, including lubrication.

Battery Service

Sparking Plug Service

Useful Information

Tracing Troubles

Common problems and their probable causes, categorized by symptom.

Repairs and Service

Service Department Information

Driver and Legal Requirements

Information on insurance, driving licenses, and passenger regulations.

Machine and Legal Requirements

Legal requirements for machine registration, licensing, and road use.

Legal Requirements and Equipment

New Machine Registration

Steps and documents required to register a new motorcycle.

Free Service Scheme

Spare Parts

Tools and Special Equipment

Guarantee

General Guarantee Terms

Details of warranty coverage, part replacement, and exclusions.

A.J.S. 20 De-Luxe Specifications

General IconGeneral
ManufacturerA.J.S.
Model20 De-Luxe
Bore x Stroke74 mm x 81 mm
Fuel SystemCarburettor
Engine TypeSingle cylinder, four-stroke

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