Tomos A3 Automatic 3 Moped Parts Catalog

🏷️ Basic Information

Make:

Tomos

Model:

A3 Automatic 3

Type:

Moped

Model variant:

A3 two-speed automatic moped

Production years covered:

A3 production era, late 1970s to 1980s - refer to manual for exact model-year applicability

Document type:

Parts catalog - service and repair manual

👋 Introduction

Designed for:

Technicians, mechanics, and DIY enthusiasts

Content level:

Factory-level repair procedures, diagnostic information, and technical specifications

Skill range:

Suitable from basic owner maintenance to complete engine rebuild

Completeness:

Complete service and repair coverage - every single detail of the A3 Automatic 3

Diagrams:

Exploded-view parts diagrams with OEM part numbers

Searchability:

Fully searchable, zoomable, printable PDF with bookmarked chapters

Advantage over generic manuals:

Dedicated Tomos A3 coverage - model-specific parts numbers, torque specs, and procedures rather than generalized moped content

📋 Manual Details

Coverage areas:

Engine, transmission, electrical, brakes, suspension and steering, fuel system, wheels and frame

Manual type:

Service and repair manual with complete parts catalog

Vehicle:

Tomos A3 Automatic 3 moped, all variants

File format:

Searchable PDF (zoomable, printable, bookmarked chapters)

Delivery method:

Instant digital download - no shipping, no waiting

Access:

Download again anytime after purchase

Compatibility:

Works on Windows PC, Mac, tablets, and smartphones

Language:

English

Binding:

Digital

Page count:

N/A - not specified for this catalog

📖 Manual Coverage

Engine:

Complete engine overhaul - disassembly, inspection, rebuild

Transmission:

Transmission and drivetrain service, two-speed automatic clutch

Electrical:

Electrical system diagnostics and repair with wiring diagrams

Brakes:

Brake system inspection and service

Suspension and steering:

Suspension and steering components

Fuel system:

Fuel system maintenance and repair, carburetor service

Cooling:

Air-cooled two-stroke engine cooling references

Frame and wheels:

Frame, wheels, and related hardware

General:

General information, safety warnings, and maintenance schedules

Disassembly:

Step-by-step system assembly and disassembly illustrations

Diagnostics:

Troubleshooting flowcharts and symptom-based diagnostic trees

Electrical testing:

Electrical system testing with multimeter procedures

Verification:

Component function verification

Tool usage:

Procedural diagrams with special service tool usage illustrations

Torque specifications:

All factory torque specs and tightening torques for all fasteners

Tolerances:

All factory specifications, tolerances, and wear limits included

Wear limits:

Wear limit inspections and allowable tolerances for all components

Special tools:

Special service tool numbers with illustrations

Parts diagrams:

Exploded-view parts diagrams

Part numbers:

OEM part numbers for all components

Identification:

Component identification and location guides

Wiring diagrams:

Detailed wiring diagrams and electrical schematics

Procedure diagrams:

Step-by-step procedural diagrams

📊 Manual Specifications

File Format:

PDF (searchable, bookmarked, zoomable)

Compatibility:

Windows, macOS, Linux, iOS, and Android — any device with a PDF reader

Requirements:

A PDF reader application (e.g. Adobe Acrobat Reader, free)

Searchability:

Fully text searchable for fast lookup of any topic

Print Quality:

High-resolution digital pages, printable at full clarity

Binding Type:

N/A — digital download, no physical binding

Paper Type:

N/A — digital download, no physical paper

⚙️ Engine Specifications

Primary engine:

Tomos single-cylinder two-stroke gasoline engine

Displacement:

49 cc (moped-class engine)

Cooling:

Air-cooled

Engine options range:

Single engine configuration across the A3 range

Top speed:

Approximately 25-30 mph, typical of US-restricted moped-class variants - verify for your specific model

Detailed figures:

Refer to manual for detailed specifications

Fuel delivery:

Carburetor

Lubrication:

Two-stroke oil mixed with gasoline (premix) or oil-injection depending on variant

Ignition:

Magneto ignition system

🔧 Transmission

Standard transmission:

Two-speed automatic (A3 Automatic 3)

Automatic features:

Centrifugal clutch, no manual shifting required

Optional transmission:

N/A - the A3 Automatic 3 uses the two-speed automatic only

Final drive:

Chain drive to rear wheel

Service coverage:

Transmission and drivetrain service procedures included in manual

Clutch service:

Clutch inspection, adjustment, and overhaul procedures

📐 Dimensions

Wheelbase:

N/A - not specified for this model

Length:

N/A - not specified for this model

Wheels:

Small-diameter moped wheels, wire-spoked

Curb weight:

Lightweight moped, approximately 110-120 lb typical for the A3 - verify for your specific model

🛡️ Safety Features

Crash test information:

N/A - mopeds of this era were not crash tested

Active features:

Front and rear drum brakes, headlamp, taillight, and horn as required by moped regulations

Passive features:

N/A - not applicable to mopeds of this era

Brake service:

Brake system inspection and service procedures included in the manual

Electrical:

Lighting circuit diagnostics and repair covered

💡 Technology Features

Audio system:

N/A - not applicable to this moped

Instrumentation:

Basic speedometer and indicator lighting

Driver assistance:

N/A - not applicable to this model

Electrical system:

Simple 6V magneto-based electrical system with full wiring diagram included

🔧 Maintenance

Maintenance schedules:

Factory maintenance schedules included in manual

General service:

General information and safety warnings provided

Two-stroke oil:

Two-stroke engine oil at manufacturer-recommended premix ratio, or oil-injection reservoir fill per variant

Transmission fluid:

Gear oil specification per factory data in the manual

Fuel:

Regular unleaded gasoline mixed with two-stroke oil where premix applies

Common wear items:

Drive chain, brake shoes, spark plug, clutch pads, and carburetor jets

Two-stroke care:

Piston, ring, and cylinder wear inspection covered with factory wear limits

📚 Vehicle History

Brand heritage:

Tomos, TOvarna MOtornih koles (Slovenian motorcycle and moped manufacturer, founded 1954 in Koper, former Yugoslavia)

Production location:

Koper, Slovenia (then Yugoslavia)

Model evolution:

The A3 line evolved from the earlier Tomos A3 moped platform; the A3 Automatic added a two-speed automatic transmission and was widely exported to the US market in the late 1970s and 1980s

Model family:

Part of the Tomos A-series moped range that continued into later A35 and A55 generations

🏆 Awards & Recognition

Market recognition:

The Tomos A3 became one of the most common mopeds sold in the United States during the late 1970s moped boom

Formal awards:

N/A - no formal awards recorded for this model