YAMAHA YFM90R 2009 Owners Manual

This A
43D-F8199-60
YFM90RY
MANUAL DEL PROPIETARIOMANUEL DU PROPRIÉTAIRE OWNER’S MANUALREAD THIS MANUAL CAREFULLY!
It contains important safety information.LIRE ATTENTIVEMENT CE MANUEL!
II comprend d’importantes informations de s
écurité
.
LEA ESTE MANUAL ATENTAMENTE!
Contiene indicaciones importantes acerca de la seguridad.!

PRINTED IN TAIWAN2008.07(E,F,S)YAMAHA MOTOR CO., LTD.PRINTED ON RECYCLED PAPER
IMPRIMÉ SUR PAPIER RECYCLÉ
IMPRESO EN PAPEL RECICLADO
DIC183

YFM90RY
43D-F8199-60-E0
OWNER’S MANUAL
READ THIS MANUAL CAREFULLY!
It contains important safety information.

Read this manual carefully before operating this vehicle.This manual should stay with this ve-
hicle if it is sold.
EC Declaration of Conformity
conforming to Directive 98/37/EC
We, YAMAHA MOTOR CO.,LTD. 2500 Shingai, Iwata, Japan,declare in sole responsibility, that the product
YFM90RY (RK1AB07W080000001~)
(Make, model)
to which this declaration applies, conforms to the essential health
and safety requirements of Directive 98/37/EC,(If applicable)and to the other relevant Directives of EEC98/336/EEC or 2004/108/EC(Title and/or number and date of issue of the other Directives of EEC)
(If applicable)To effect correct application of the essential health and safety requirements
stated in the Directives of EEC, the following-standards and/or technical
specifications were consulted: EN292 ANSI/SVIA 1-2007
(Title and/or number and date of issue of standards and/or specifications)
Manufacturer
E-TON POWER TECH.,LTD
498, Section2, Bentian Road, Tainan, TAIWAN
Authorized Representative
YAMAHA MOTOR EUROPE N.V.
Koolhovenlaan 101,1119NC Schiphol-Rijk,The Netherlands
Signature ________________
Shinya Shimada
General Manager
RV Engineering Division
RV Company
Date of Issue19 February, 2008

INTRODUCTION
Congratulations on your purchase of the Yamaha YFM90RY. This ATV represents the result of many years
of Yamaha experience in the production of fine sporting, touring, and pacesetting racing machines. With the
purchase of this Yamaha, you can now appreciate the high degree of craftsmanship and reliability that have
made Yamaha a leader in these fields.
This manual will provide you with a good basic understanding of the features and operation of this ATV.
This manual includes important safety information. It provides information about special tech-
niques and skills necessary to ride the ATV. It also includes basic maintenance and inspection proce-
dures. If you have any questions regarding the operation or maintenance of your ATV, please consult a
Yamaha dealer.
AN IMPORTANT SAFETY MESSAGE:READ THIS MANUAL COMPLETELY BEFORE OPERATING YOUR ATV. MAKE SURE YOU
UNDERSTAND ALL INSTRUCTIONS.PAY CLOSE ATTENTION TO THE WARNING AND NOTICE LABELS ON THE ATV.THIS ATV, AND ANY OTHER ATV OVER 70 cc, SHOULD NOT BE OPERATED BY A CHILD UNDER
12 YEARS OF AGE.
AN IMPORTANT NOTE TO PARENTS:
This ATV is not a toy. Before you let your child ride this ATV, you should understand the instructions and
warnings in this Owner’s Manual. Then be sure your child understands and will follow them. Children differ

in skills, physical abilities and judgment. Some children may not be able to operate an ATV safely. Parents
should supervise their child’s use of the ATV at all times. Parents should permit continued use only if they
determine that the child has the ability to operate the ATV safely.Your ATV was delivered with an adjustable speed limiter . Yamaha recommends that all beginners start off
to limit the amount of speed available while they learn. The adjusting screw may be gradually turned out
as the beginner becomes more familiar with operating the ATV. Parents should decide when to adjust
the ATV for more power as their youngster’s riding skills improve. Once the ATV rider can operate with
skill at the top speed permitted by adjusting the vehicle speed limiter alone, the engine speed limiter
plate can be removed. Since removal of this limiter will result in a significant increase in power, turn the
vehicle speed limiter adjusting screw completely back in again; adjust it out in stages as done previously.
If your child is a beginner or is inexperienced, he or she should take a training course.

WARNING
N O T I C ETIPThis is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
damage to the vehicle or other property.
A TIP provides key information to make procedures easier or clearer.
A WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury. A NOTICE indicates special precautions that must be taken to avoid

IMPORTANT MANUAL INFORMATION
FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS IN-
JURY OR DEATH.
Particularly important information is distinguished in this manual by the following notations:
* Product and specifications are subject to change without notice.

IMPORTANT NOTICE

YFM90RY
OWNER’S MANUAL
©2008 by Yamaha Motor Co., Ltd. 1st edition, July 2008All rights reserved.
Any reprinting or unauthorized use without the written permission of Yamaha Motor Co., Ltd.
is expressly prohibited. Printed in Taiwan.
Welcome to the Yamaha world of motor sports!
This ATV is designed and manufactured for use on UNPAVED surfaces only. It is unsafe to operate this
ATV on any paved surface, paved street, paved road or motorway.
Please check your local riding laws and regulations before operating this ATV.

TABLE OF CONTENTS
SAFETY INFORMATION..............................1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS............................2-1DESCRIPTION ..............................................3-1 Left view.....................................................3-1Right view...................................................3-1
Controls and instruments...........................3-2
INSTRUMENT AND CONTROL
FUNCTIONS..................................................4-1 Main switch...............................................4-1
Handlebar switches ................................... 4-2
Throttle lever ............................................. 4-3
Speed limiters............................................. 4-3
Front brake lever ........................................ 4-6
Rear brake lever ....................................... 4-6
Parking brake ............................................ 4-7
Fuel tank cap ............................................ 4-8 Fuel ........................................................... 4-8
Fuel cock .............................................. 4-10
Choke ..................................................... 4-11
Seat ........................................................ 4-11
PRE-OPERATION CHECKS.........................5-1 Pre-operation check list............................5-1
Fuel ........................................................... 5-3
Engine oil .................................................. 5-3
Final transmission oil ................................ 5-3
Front and rear brakes ............................... 5-3
Throttle lever ............................................. 5-4
Tires .......................................................... 5-4
Measuring the tire pressure ...................... 5-5
Tire wear limit ........................................... 5-6
Chassis fasteners ..................................... 5-7
Instruments and switches ......................... 5-7
OPERATION................................................6-1 Starting a cold engine ............................... 6-1
Starting a warm engine ............................. 6-3
Engine break-in ........................................ 6-4
Parking ..................................................... 6-4
Parking on a slope ................................... 6-5
Accessories and loading .......................... 6-6
Vehicle speed limiter ................................. 4-4
Engine speed limiter plate.......................... 4-5 Kick starter
............................................. 4-12

Cleaning the spark arrester ...................... 8-19
Adjusting the carburetor ........................... 8-20
Adjusting the engine idling speed ............ 8-20
Checking the throttle cable free play ....... 8-21
Timing chain ............................................ 8-22
Valve clearance ....................................... 8-22
Checking the front brake shoes................ 8-22
Adjusting the front brake lever free play ....................................................... 8-23
Checking the rear brake pads ................. 8-25
Checking the brake fluid level ................. 8-25
Changing the rear brake fluid .................. 8-26
Checking the rear brake lever free play ........................................................8-26
Checking and lubricating the cables........ 8-27
Checking and lubricating the front and rear brake levers............................... 8-27
Checking the wheel hub bearings ............ 8-28
Battery ..................................................... 8-28
Replacing the fuse ................................... 8-30
Removing a wheel ................................... 8-32
Installing a wheel ..................................... 8-33
Troubleshooting ....................................... 8-34
Troubleshooting chart .............................. 8-35
RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV...............7-2
RIDE WITH CARE AND GOOD JUDGEMENT ............................................ 7-2
BE CAREFUL WHERE YOU RIDE...........7-11
TURNING YOUR ATV..............................7-15
CLIMBING UPHILL....................................7-17
RIDING DOWNHILL..................................7-20
CROSSING A SLOPE................................7-21
CROSSING THROUGH SHALLOW WATER ................................................... 7-22
RIDING OVER ROUGH TERRAIN...........7-24
SLIDING AND SKIDDING.........................7-25
WHAT TO DO IF.......................................7-26
WHAT TO DO... ........................................ 7-26
PERIODIC MAINTENANCE AND MINOR
REPAIR..........................................................8-1 Owner’s manual and tool kit ...................... 8-1
Periodic maintenance chart for the emission control system .......................... 8-3
General maintenance and lubrication chart ........................................................ 8-5

Checking the spark plug ............................. 8-9
Engine oil ................................................. 8-11
Final transmission oil ................................ 8-14
Cleaning the air filter element .................. 8-15 CLEANING AND STORAGE.........................9-1
Cleaning ..................................................... 9-1
Storage ...................................................... 9-2 Brakes ..................................................... 8-22