Honda - Workshop Manual - Service Manual for CG125 (June 1976 to September 1991)

Oct 23, 2026

Service and workshop manual for Honda CG125 variants covering model codes CG125, CG125-B, CG125-E, CG125(BR)-E/F, CG125(BR)-J, and CG125(BR)-K. Explains the manual’s structure with six chapters split into numbered sections and paragraphs, and clarifies cross-referencing conventions (e.g., “See Section 5.12”). Provides background on the CG125’s UK introduction in June 1976, key technical differences such as pushrod overhead valves, typical use as learner or commuter, and maintenance-relevant features like a full rear chain enclosure.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages128

Reading Time5 h 23 min

AccessFree to download

Acknowledgements

About this manual

Manual structure and cross-references

Contents

Introduction to the Honda

Model dimensions and weight

Ordering spare parts

Safety first!

Routine maintenance

Quick glance maintenance adjustments and capacities

Recommended lubricants

Working conditions and tools

Chapter 1 Engine, clutch and gearbox

Chapter 2 Fuel system and lubrication

Chapter 3 Ignition system

Chapter 4 Frame and forks

Chapter 5 Wheels, brakes and tyres

Chapter 6 Electrical system

Chapter 7 The on models

Wiring diagrams

Conversion factors

Index

Honda Workshop Manual by Pete with an additional Chapter on the on models by Jeremy Churchill Models covered CG125 . 124cc. June 1976 to May 1978 124cc. May 1978 to March 1981 CG125-B. 124cc. March 1981 to March 1982 124cc. March to November CG125-E. 124cc. November 1984 to April 1985 CG125(BR)-E/F. 124cc. April 1985 to April 1988 CG125(BR)-J. 124cc. April 1988 to September 1991 CG125(BR)-K. 124cc. September 1991 on 1 85010 918 4 © Publishing 1994 All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical , including photocopying , recording or by any information storage or retrieval system , without permission in writing from the copyright holder. Printed in the USA Haynes Publishing Sparkford Nr Yeovil Somerset BA22 7JJ England Haynes Publications, Lawrence Drive Park California 91320 USA British Library in Publication Data A catalogue record for this book is available from the British Library Acknowledgements Our thanks are due to APS Motorcycles of Wells (formerly Fran & Co), Paul Branson Motorcycles of Yeovil , and CSM of Taunton , who supplied the machines featured in this manual. We would also like to thank the Avon Rubber Company, who kindly supplied information and technical assistance on tyre fitting ; NGK Spark Plugs (UK) Ltd for information on spark plug maintenance and electrode conditions and Renold Limited for advice on chain care and renewal. About this manual The author of this manual has the conviction that the only way in which a meaningful and easy to follow text can be written is first to do the work himself, under conditions similar to those found in the average household. As a result, the hands seen in the photographs are those of the author. Even the machines are not new: examples that have covered a considerable mileage were selected so that the conditions encountered would be typical of those found by the average owner. Unless specially mentioned , and therefore considered essential, Honda service tools have not been used. There is invariably some alternative means of slackening or removing some vital component when service tools are not available and risk of damage has to be avoided at all costs. Each of the six Chapters is divided into numbered Sections. Within the Sections are numbered paragraphs. In consequence, cross reference throughout this manual is both straightforward and logical. When a reference is made 'See Section 5.12' it means Section 5, paragraph in the same Chapter. If another Chapter were meant, the text would read 'See Chapter 2 , Section 5. 12'. All photographs are captioned with a Section/paragraph number to which they refer and are always relevant to the Chapter text adjacent. Figure numbers (usually line illustrations) appear in numerical order, within a given Chapter. Fig. therefore refers to the first figure in Chapter Left-hand and right-hand descriptions of the machines and their component parts refer to the right and left of a given machine when the rider is seated normally. Motorcycle manufacturers continually make changes to specifications and recommendations , and these , when notified , are incorporated into our manuals at the earliest opportunity. We take great pride in the accuracy of information given in this manual, but motorcycle manufacturers make alterations and design changes during the production run of a particular motorcycle of which they do not inform us. No liability can be accepted by the authors or publishers for loss, damage or injury caused by any errors in , or omissions from , the information given. Contents | Page | | | --- | --- | | Acknowledgements | 2 | | About this manual | 2 | | Introduction to the Honda | 5 | | Model dimensions and weight | 5 | | Ordering spare parts | | | Safety first! | 7 | | Routine maintenance | 8 | | Quick glance maintenance adjustments and capacities | 13 | | Recommende

FAQs

Which Honda CG125 models and production ranges are covered?

The manual covers CG125 variants including CG125, CG125-B, CG125-E, CG125(BR)-E/F, CG125(BR)-J, and CG125(BR)-K. The provided ranges span from June 1976 through September 1991, with each suffix mapped to a specific period.

How is the manual organized for finding information quickly?

The six chapters are divided into numbered sections, and each section contains numbered paragraphs. Cross-references within a chapter use the format like “See Section 5.12,” and photographs are captioned with the relevant section/paragraph number.

What key technical background is given for the CG125?

The manual states the model first appeared in the UK in June 1976 and describes it as a utility version of the popular CB125. It highlights the use of pushrod-operated overhead valves instead of an overhead camshaft arrangement and notes features like a full rear chain enclosure for extending chain life.

Oct 23, 2026

Upload by Blue Pony