Yamaha YFM660 Service Manual - How to Use This Manual - Illustrated Symbols

Nov 4, 2026

Yamaha YFM660 service manual for Yamaha dealers and qualified mechanics provides guidance for safe, correct maintenance and repair procedures. The manual explains how to use the publication through its organized chapter structure and illustrated symbols system. It defines the safety alert symbol, warning and caution notations, and notes intended to clarify key information. It also describes how exploded diagrams, numbered steps, symbol marks, and job instruction charts support identification of parts and step-by-step work.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages328

Reading Time13 h 47 min

AccessFree to download

How to Use This Manual

Manual Organization

Exploded Diagrams

Illustrated Symbols

Table of Contents (by chapters)

General Information

Specifications

Periodic checks and adjustments

Chassis

Engine

Cooling system

Carburetion

Electrical

Troubleshooting

YFM660RN YFM660RNC SERVICE MANUAL LIT-11616-14-21 5LP-28197-E0 EB001000 NOTICE This manual was produced by the Yamaha Motor Company primarily for use by Yamaha dealersand their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual, so it is assumed that anyone who uses this book to perform maintenance and repairs on Yamaha machine has a basic understanding of the mechanical ideas and the procedures of machine repair. Repairs attempted by anyone without this knowledge are likely to render the machine unsafe and unfit for use. Yamaha Motor Company, [Ltd. is](Ltd. is) continually striving to improve all its models. Modifications and significant changes in specifications or procedures will be forwarded to all authorized Yamaha dealersand will appear in future editions of this manual where applicable. NOTE: Designs and specifications are subject to change without notice. IMPORTANT INFORMATION Particularly important information is distinguished in this manual by the following notations. The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! WARNING Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander or a person inspecting or repairing the machine. CAU TION: A CAUTION indicates special precautions that must be taken to avoid dam age to the machine. NOTE: A NOTE provides key information to make procedures easier or clearer. EB002000 HOW TO USE THIS MANUAL MANUAL ORGANIZATION This manual consists of chapters for the main categories of subjects. (See “Illustrated symbols”) 1st title 1: This is the title of the chapter with its symbol in the upper right corner of each page. 2nd title 2 : This title indicates the section of the chapter and only appears on the first page of each section. It is located in the upper left corner of the page. 3rd title 3 : This title indicates a sub-section that is followed by step-by-step procedures accompanied by corresponding illustrations. EXPLODED DIAGRAMS To help identify parts and clarify procedure steps, there are exploded diagrams at the start of each removal and disassembly section. 1. An easy-to-see exploded diagram 4 is provided for removal and disassembly jobs. 2. Numbers 5 are given in the order of the jobs in the exploded diagram. A number that is enclosed by a circle indicates a disassembly step. 3. An explanation of jobs and notes is presented in an easy-to-read way by the use of symbol marks 6. The meanings of the symbol marks are given on the next page. 4. A job instruction chart 7 accompanies the exploded diagram, providing the order of jobs, names of parts, notes in jobs, etc. 5. For jobs requiring more information, the step-by-step format supplements 8 are given in addition to the exploded diagram and the job instruction chart. |
1
GEN INFO
| | | | 2
SPEC | | | | --- | --- | --- | --- | --- | --- | --- | |
3
CHKADJ
| | | | 4
CHAS | | | | 5
ENG
| | | | 6
COOL | | | | 7
CARB

| | | | 8
ELEC
– + | | | |
9
TRBL SHTG | | | | 0
| | | | A | | | | B | | | | C | | | | D | | | | E | | F | | | G | | | H | | I
| | | J

M | | | K L M N
| | | | | | | | O

LT | | | | P

New | | | EB003000 ILLUSTRATED SYMBOLS Illustrated symbols 1 to 9 are printed on the top right of each page and indicate the subject of each chapter. 1 General information 2 Specifications 3 Periodic checks and adjustments 4 Chassis 5 Engine 6 Cooling system 7 Carburetion 8 Electrical 9 Troubleshooting Illustrated symbols 0 to G are used to identify the specifications appearing in the text. 0 Can be serviced with engine mounted A Filling fluid B Lubricant C Special tool D Torque E Wear limit, clearance F Engine speed G Ω , V, A Illustrated symbols H to N in the exploded d

FAQs

Who is this Yamaha YFM660 service manual intended for?

It is primarily produced for use by Yamaha dealers and their qualified mechanics, assuming the user has basic mechanical knowledge and repair procedures awareness.

How does the manual organize chapters, sections, and sub-sections?

It is organized into chapters for main subject categories, with each page showing a chapter title and symbol. Section and sub-section titles appear on specific pages, supporting step-by-step procedures with illustrations.

What do the illustrated symbols represent in the manual and exploded diagrams?

Illustrated symbols identify the subject of each chapter and specification items in the text. In exploded diagrams, symbols indicate lubricant types and lubrication points, and also where to apply locking agents or replace parts.

Nov 4, 2026

Uploaded by Jordan Avery