Tomos A31988 User Manual

1
Tomos A3 1988 Workshop Manual
CONTENTS
Technical Data ………………………………………………………………………………………………………………………………………..2
Nuts, Bolts, and Torque Specs …………………………………..…………………………………………………………………………..3
Special Tools……………………………………………………………………………………………………………………………………………3
Image..……………………………………………………………………………………………………….………………….….……….4
Engine Removal…………………………………………………………………………………………………….…………………………..……5
Engine Disassembly…………………………….……………………………………………………………….…………………………….…..8
Checking Engine Parts and Assemblies ………………………………………………………………………………………………..11
Checking, Dismantling, and Assembling of the Clutch ……………………………………………………….………………..13
Dismantling, Checking, and Assembling of the Countershaft ………………………….…………………………………..15
Checking Pedal Shaft and Transmission Chain .……………………………………………………………………………….……17
Carburetor Checking……………………………………………………………………..………………………………………………………18
Encarwi Image………………………………………………………..………………………………………………………………..18
Dellorto Image……………………………………………………………………………………………………………………….…19
Reassembling the Engine .……………………………….………………………………………………….……………………………….20
Adjusting the Contact Gap and Ignition Advance ……………………….……………………………………………………….23
Oil Pump……………………………………………………………………………………………………………………………………………….24
Magneto Settings and Electrical Equipment…………………………………….…………………………………………..……..25
Wiring Diagrams (COLOR!)
European without turn signals………………………………………………………………………………………………….26
European with turn signals……………………………………………………………………………………………………….27
U.S. without turn signals…………………………………………………………………………………………………………..28
U.S. with turn signals………………………………………………………………………………………………………….…….29
The following is a modified and English-only version of the A3 manual found at www.classiccycles.org
Please note that this version is NOT guaranteed to be a perfect reproduction of the original; if you have
any doubts as to what you are reading, please check the original to be sure.

Tomos A31988 Specifications

General

Transmission	4-speed manual
Displacement	49cc
Fuel System	Carburetor
Engine	Single cylinder, two-stroke
Engine Type	2-stroke
Brakes	Drum brakes (front and rear)
Tires	2.50-16

Summary

Technical Data

Nuts, Bolts, and Torque Specifications

Special Tools

Engine Removal

Engine Disassembly

Checking Engine Parts and Assemblies

Checking, Dismantling, and Assembling of the Clutch

Dismantling, Checking, and Assembling of the Countershaft

Checking Pedal Shaft (Kickstart) and Transmission Chain

Carburetor Checking

Reassembling the Engine

Adjusting the Contact Gap and Ignition Advance

Oil Pump

Magneto Settings and Electrical Equipment

Wiring Diagrams (COLOR!)

European without turn signals

Electrical wiring diagram for European models without turn signals.

European with turn signals

Electrical wiring diagram for European models with turn signals.

U.S. without turn signals

Electrical wiring diagram for US models without turn signals.

U.S. with turn signals

Electrical wiring diagram for US models with turn signals.