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Matchless Motor Cycles 41-G3L 1941 - User Manual

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BOOK No. 101-MCI
MAINTENANCE
MANUAL
AND
INSTRUCTION
BOOK
MATCHLESS
M O TO R C YC L E S
PROPRIETORS: ASSOCIATED MOTOR CYCLES LIMITED
EDITION M.M.I
for
MOTOR CYCLE, SOLO, 350 c.c.
O.H.V., MATCHLESS
MODEL 41-G3L
www.ajs-matchless.info
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Summary

Introduction

Controls

Throttle Twist Grip Operation

Details on operating the throttle twist grip for engine speed control.

Air Control Lever Operation

Instructions for using the air control lever for engine mixture adjustment.

Ignition Control Operation

How to advance and retard the ignition point using the control lever.

Valve Lifter Lever

Identification and function of the valve lifter lever.

Clutch Lever

Identification and function of the clutch control lever.

Front Brake Lever

Identification and function of the front brake lever.

Rear Brake Pedal

Identification and function of the rear brake pedal.

Gear Change Pedal

Identification and function of the gear change pedal.

Kick-Starter Pedal

Identification and function of the kick-starter pedal.

Lighting Switch

Identification and function of the lighting switch.

Ammeter Indicator

Location and function of the ammeter.

Electric Horn Button

Location and function of the electric horn button.

Engine Lubrication System

Engine Oil Pump

Engine Oil Circulation Paths

Oil Tank and Filter Maintenance

Accessing the Oil Filter

Steps to gain access to the oil filter for removal and cleaning.

Refitting the Oil Filter

Procedure for correctly reinstalling the oil filter.

Checking Oil Circulation

Oil Feed Adjustment

Exhaust Valve Stem Lubrication

Key Lubrication Points

Gearbox Lubrication

Chain Lubrication Procedures

Hub Lubrication

Brake Cam Lubrication

Brake Rod Joint Lubrication

Brake Pedal Lubrication

Speedometer Lubrication

Front Fork Lubrication and Fluid Level

Front Fork Fluid Level Test and Top-Up

Step-by-step guide to checking and topping up front fork oil.

Steering Head Bearing Lubrication

Control Lever Lubrication

Magneto and Dynamo Lubrication

Stand Fixing Bolt Lubrication

Petrol Tank Removal

Petrol Tank Replacement

Rocker Box Removal

Rocker Box Replacement

Cylinder Head Removal

Cylinder Head Replacement

Cylinder Barrel Removal

Piston Removal

Valve Removal and Replacement

Piston and Cylinder Barrel Refitting

Engine Decarbonisation

Valve Grinding Procedure

Valve Guide Removal and Replacement

Tappets and Guides Overview

Tappet Guide Removal

Complete Power Unit Removal

Power Unit Disconnection Points

List of cables and pipes to disconnect before power unit removal.

Power Unit Component Removal

Steps for removing various components attached to the power unit.

Power Unit Draw-Forward Steps

Items to draw forward for clearance during power unit removal.

Power Unit Frame Attachment Removal

Specific bolts and regulators to remove from the frame.

Lucas Dynamo Wire Disconnection

Procedure for disconnecting Lucas dynamo wiring.

Miller Dynamo Wire Disconnection

Procedure for disconnecting Miller dynamo wiring.

Oil Tank Draining

Instructions for draining the oil tank before power unit removal.

Power Unit Ancillary Component Removal

Removing rear chain guard, oil tank stay, and saddle bolt.

Engine Only Removal

Rear Frame Assembly Removal

Steps to detach the rear frame assembly from the engine.

Engine Front Plate Removal

Procedure to remove the engine front plate or horn platform.

Main Frame and Forks Separation

How to separate the main frame and forks from the engine unit.

Power Unit Refitting Notes

Important notes on refitting the power unit assembly.

Engine Disconnection Points

List of electrical and mechanical connections to disconnect from the engine.

Engine Component Removal for Isolation

Components to remove from the engine before lifting it.

Front Chaincase and Clutch Removal

Engine Unit Final Separation

Refitting Chaincase and Clutch

Engine Dismantling

Engine Component Removal for Dismantling

List of engine parts to remove before splitting the crankcase.

Engine Dismantling Refitting Notes

Important considerations for reassembling engine parts.

Flywheel Dismantling

Flywheel Assembly

Connecting Rod Big-End Liner Fitting

Gudgeon Pin Bush Fitting

Timing Side Flywheel Axle Fitting

Timing Side Flywheel Axle Bush Fitting

Timing Side Roller Bearing Removal;Fitting

Driving Side Ball Bearings

Camshaft Bush Removal and Fitting

Timing Gear Camshafts

Cam Contour Description

Valve Timing Specifications

Tappet Adjustment Procedure

Adjusting Tappet Clearances

Detailed steps for setting the correct tappet clearances.

Overhead Valve Rockers

Assembling Overhead Rocker Assembly

Instructions for assembling the overhead rocker arm components.

Ignition Timing Retiming

Checking Contact Breaker Points

Steps to check and adjust the contact breaker points.

Setting Ignition Firing Point

Procedure for setting the engine's ignition firing point.

Oversize Parts and Cylinder Re-boring

Gearbox Overview

Transmission of Power Through Gears

First Gear Operation

Detailed explanation of power transmission in first gear.

Second Gear Operation

Detailed explanation of power transmission in second gear.

Third Gear Operation

Detailed explanation of power transmission in third gear.

Fourth Gear (Top) Operation

Detailed explanation of power transmission in fourth gear.

Gearbox Removal

Clutch Removal

Accessing Clutch Plates and Springs

Clutch Mechanism Description

Clutch Spring Adjustment

Adjusting Clutch Spring Nuts

Detailed steps for adjusting clutch spring nuts for proper tension.

Clutch Adjustment Procedures

Clutch Cable Adjustment

Accessing Clutch Cable at Gearbox

Gearbox Camshaft and Forks

Kick-Starter Operation

Gearbox Dismantle and Re-assemble (In Frame)

Gearbox Removal Steps (In Frame)

List of components to remove before gearbox extraction.

Gearbox Internal Component Removal

Steps for removing internal gearbox parts.

Gearbox Re-assembly Process

Layshaft Gear Assembly

Instructions for assembling gears onto the gearbox layshaft.

Kick-Starter Cover Re-fit Notes

Gearbox Sprocket Retaining Nut Removal

Gearbox Sprocket Nut Removal Steps

Steps including engaging gear and applying brake for nut removal.

Layshaft Bush Fitting

Front Chain Adjustment

Tightening the Front Chain

Step-by-step guide to adjusting front chain tension.

Front Chain Adjustment Slackening

Initial loosening steps for front chain adjustment.

Front Chain Adjustment Check

Rear Chain Adjustment

Tightening the Rear Chain

Step-by-step guide to adjusting rear chain tension.

Rear Chain Adjustment Notes

Important notes regarding chain adjustment order and checks.

Dynamo Chain Adjustment

Tightening the Dynamo Chain

Steps for adjusting dynamo chain tension.

Magneto Chain Adjustment

Tightening the Magneto Chain

Steps for adjusting magneto chain tension.

Engine Shock Absorber

Front Chaincase and Clutch Refitting

Front Chaincase Back Half Fitting

Steps to refit the rear half of the front chaincase.

Front Chaincase Spacer and Bolt Fitting

Clutch Sprocket and Centre Fitting

Front Driving Chain and Clutch Centre Nut Fitting

Clutch Plates and Springs Fitting

Front Chaincase Outer Half Fitting

Assembly Notes

Front Wheel Removal

Front Wheel Brake Cable Disconnection

Disconnecting the front brake cable before wheel removal.

Front Wheel Spindle Nut Slackening

Loosening the front wheel spindle nut.

Front Wheel Fork Slider Cap Removal

Removing fork slider caps for wheel removal.

Rear Wheel Removal

Rear Wheel Disconnection Points

Disconnecting electrical and chain connections from the rear wheel.

Rear Wheel Mudguard and Stay Removal

Removing rear mudguard parts and brake rod nut.

Rear Wheel Mudguard Stay Slackening

Loosening rear mudguard stays.

Rear Wheel and Mudguard Removal

Removing the rear wheel and mudguard assembly.

Wheel Alignment Checks

Rough Wheel Alignment Test

A practical test for checking wheel alignment.

Wheel Bearings Overview

Wheel Bearing Adjustment

Wheel Bearing Dismantling

Wheel Bearing Lock Ring Slackening

Loosening the lock ring on the wheel bearing.

Wheel Bearing Adjusting Ring Unscrewing

Unscrewing the adjusting ring for bearing removal.

Wheel Bearing Component Removal

Removing bearing components like washers and collars.

Wheel Bearing Inner Component Removal

Wheel Bearing Assembly (Front or Rear)

Fitting Outer Bearing Cup

Pressing the outer bearing cup into the hub shell.

Bearing Assembly Component Placement

Placing washers, collars, and spring rings around the bearing.

Refitting Spring Split Ring

Reinstalling the spring split ring into the hub shell.

Hub Shell Bearing Assembly

Assembling bearings and components within the hub shell.

Final Bearing Assembly Placement

Placing final washers and adjusting ring.

Hub Bearing Adjustment

Final adjustment of hub bearings as per Paragraph 81.

Front Brake Cover Plate Positioning Note

Important note on positioning the front brake cover plate.

Brake Shoes Description

Brake Shoe Adjustment

Centralising Brake Shoes

Procedure to centralise brake shoes in the drum before wheel fitting.

Front Brake Cover Plate

Brake Pedal Adjustment

Rear Brake Adjustment

Adjusting the Rear Brake

Steps to adjust rear brake shoes touching the drum.

Front Brake Adjustment

Adjusting the Front Brake

Steps to adjust front brake shoes touching the drum.

Brake Drums

Rims, Spokes, and Security Bolts

Tyres and Service

Tyre Removal Procedure

Outer Cover and Inner Tube Removal

Detailed guide to removing the tyre cover and inner tube.

Tyre Fitting Procedure

Refitting Inner Tube and Outer Cover

Step-by-step guide to refitting the tyre components.

Tyre Fitting Valve Cap Note

Importance of using the valve cap to prevent deflation.

Steering Head Adjustment

Adjusting Steering Head Bearings

Detailed steps for adjusting steering head bearing tightness.

Steering Head Adjustment Slackening

Initial steps to loosen steering column nuts.

Front Forks (Teledraulic) Description

Front Fork Assembly

Front Fork Sub-Assembly Preparation

Steps to prepare five sub-assemblies for fork construction.

Fork Crown and Cover Tube Assembly

Assembling the fork crown and cover tubes.

Inner Tube Right Assembly

Assembling the right-hand inner tube components.

Front Fork Oil Seal Handling Note

Cautionary note on handling oil seals during fork assembly.

Inner Tube Left Assembly

Right-Hand Damper Tube and Slider Assembly

Left-Hand Damper Tube and Slider Assembly

Fitting Fork Sub-Assemblies to Machine

Fork Crown, Steering Column Fitting

Fitting the fork crown, steering column, and handlebar clip lug.

Inner Tube Assemblies to Fork Crown Fitting

Attaching inner tube assemblies to the front fork crown.

Left-Hand Damper Tube and Slider to Inner Tube Fitting

Connecting damper tube and slider to inner tube.

Right-Hand Damper Tube Assembly Fitting

Fitting the right-hand damper tube assembly.

Completing Front Fork Assembly

Final steps for assembling the front fork, including oiling.

Final Adjustments and Component Fitting

Front Fork Assembly Cleanliness Note

Prop Stand

Front Stand

Rear Stand

Oil Tank and Battery Carrier Removal

Oil Tank and Battery Carrier Removal Steps

Steps to remove the oil tank and battery carrier assembly.

Oil Tank and Carrier Disconnection

Disconnecting oil pipes from the oil tank.

Oil Tank and Carrier Component Removal

Removing carburetter intake, oil tank stay, and nuts.

Nuts, Bolts, and Threads

Carburetter Overview

Carburetter Function

Carburetter Adjustment

Carburetter Tuning Tips

Causes of Poor Idling

List of potential causes for poor engine idling.

Causes of Heavy Petrol Consumption

List of potential causes for increased fuel consumption.

Twist Grip Adjustment

Control Levers and Cables

Electrical Equipment Types

Magneto Type

Magneto Contact Breaker Lubrication

Contact Breaker Removal

Steps to remove the contact breaker for lubrication.

Contact Breaker Spring Blade Removal

Contact Breaker Reassembly

Magneto Contact Breaker Cleaning

Contact Breaker Points Adjustment

Checking and Adjusting Contact Breaker Points

Detailed steps for setting the contact breaker point gap.

Contact Breaker Adjustment Note

High-Tension Wire Specifications

Magneto High-Tension Pick-up

Suppressor and Immobilizer Checks

Magneto Chain Drive

Ignition Timing

Magneto Dismantling

Magneto Platform Removal from Motorcycle

Steps to remove the magneto and its platform from the bike.

Complete Magneto Dismantling

Instructions for taking apart the magneto unit.

Magneto Test and Repair

Magneto Assembly

Sparking Plug Details

Dynamo Types

Dynamo Removal

Dynamo Removal Steps

Detailed steps for removing the dynamo unit.

Dynamo Removal Locating Plate Note

Note on the locating plate for dynamo chain alignment.

Dynamo Replacement

Dynamo Replacement Steps

Procedure for installing a new dynamo unit.

New Dynamo Locating Plate Fitting

Fitting the locating plate to a new dynamo.

Dynamo Removal Notes

Lucas Dynamo Dismantling

Lucas Dynamo Dismantling Steps

Detailed steps for taking apart a Lucas dynamo.

Lucas Dynamo Dismantling Observations

Lucas Dynamo Armature Shaft Warning

Lucas Dynamo Assembly

Miller Dynamo Dismantling

Miller Dynamo Dismantling Steps

Detailed steps for taking apart a Miller dynamo.

Miller Dynamo Assembly

Dynamo Test and Repair

Dynamo Commutator and Brush Gear Cleaning

Checking and Cleaning Brush Gear

Steps to check brush action and clean the brush gear.

Checking and Cleaning Commutator

Fitting New Dynamo Brushes

Bedding New Dynamo Brushes

Method for bedding new brushes to ensure good contact.

Remedy for Badly Worn Commutator

Repairing a Worn Commutator

Steps for turning and undercutting a worn commutator.

Dynamo Field Coil Test and Repair

Dynamo Armature Test and Repair

Dynamo Lubrication (Lucas)

Dynamo Lubrication (Miller)

Regulator and Cut-Out

Cleaning Cut-Out Contacts

Procedure for cleaning dynamo cut-out contacts.

Ammeter Check

Battery Maintenance (Lucas and Miller)

Battery Top-Up Procedure

Steps for topping up the battery cells with distilled water.

Battery Charging

Lucas Headlamp Description

Miller Headlamp Description

Head Lamp Fitting Notes

Lucas Rear Lamp Description

Miller Rear Lamp Description

Wire Loom Installation

Lucas Electrical Terminals

Miller Electrical Terminals

Earth Connection Maintenance

Horn Operation and Troubleshooting

Lucas Switch Operation

Miller Switch Operation

Fuses

Mechanical Troubles Overview

Tracing Mechanical Troubles

Troubleshooting: Engine Fails to Start

List of common causes for engine starting difficulties.

Troubleshooting: Engine Misses Fire

List of common causes for engine misfiring.

Troubleshooting: Loss of Power

Troubleshooting: Engine Overheating

Troubleshooting: Engine Stops Suddenly

Troubleshooting: Excessive Oil Consumption

Tools Included in Kit

Tool Kit Notes

Matchless Motor Cycles 41-G3L 1941 Specifications

General IconGeneral
ManufacturerMatchless Motor Cycles
Model41-G3L
Year1941
CategoryMotorcycle
Engine TypeSingle cylinder, four-stroke
Displacement348 cc
Power16 hp
IgnitionMagneto
Transmission4-speed
Suspension (Front)Telescopic fork
Suspension (Rear)Rigid
BrakesDrum
Weight330 lbs
Fuel Capacity14 liters
Power Output16 hp
Top Speed75 mph
FrameSteel