Page 9 of 350
EBU00011
IMPORTANT NOTICE
This machine is designed and manufactured for
OFF-ROAD use only. It is illegal and unsafe to
operate this machine on any public street, road
or highway.
This machine complies with all applicable OFF-
ROAD noise level and spark arrester laws and
regulations in effect at the time of manufacture.
Please check your local riding laws and regula-
tions before operating this machine.
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Page 10 of 350

FBU00011
AVIS IMPORTANT
Ce véhicule est conçu et fabriqué pour une utili-
sation TOUT-TERRAIN uniquement. La
conduite de ce véhicule sur la voie publique est
illégale et dangereuse.
Ce véhicule est conforme à toutes les législa-
tions relatives au déparasitage et au bruit des
tout-terrains en vigueur au moment de la fabri-
cation.
Prendre connaissance des règlements locaux
avant de conduire ce véhicule.
SBU00011
AVISO IMPORTANTE
Esta máquina ha sido fabricada y diseñada úni-
camente para su utilización FUERA DE
CARRETERA. Por lo tanto, es ilegal y, al mismo
tiempo, peligroso, circular con ella por autopis-
tas, carreteras o cualquier otra vía pública.
La máquina satisface todos los requisitos sobre
nivel sonoro y emisión de chispas en circulación
FUERA DE CARRETERA, establecidos por la
reglamentación y las leyes vigentes en el
momento de su fabricación.
Se ruega consultar las leyes y reglamentación
local sobre vehículos a motor antes de usar la
motocicleta.
5VJ-9-61-01 3/14/03 11:48 PM Page 9
Page 11 of 350
EBU01087
YFA1S
OWNER’S MANUAL
© 2003 by Yamaha Motor Co., Ltd.
1st edition, March 2003
All rights reserved. Any reprinting or
unauthorized use without the written
permission of Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan.
5VJ-9-61-01 3/14/03 11:48 PM Page 10
Page 12 of 350
FBU01087SBU01087
YFA1S
MANUEL DU PROPRIÉTAIRE
© 2003 par Yamaha Motor Co., Ltd.
1ère édition, Mars 2003
Tous droits réservés. Toute réimpression ou
utilisation non autorisée sans la permission
écrite de la Yamaha Motor Co., Ltd.
est formellement interdite.
Imprimé au Japon.YFA1S
MANUAL DEL PROPIETARIO
© 2003 por Yamaha Motor Co., Ltd.
1ª edición, Marzo 2003
Reservados todos los derechos. Queda
expresamente prohibida cualquier reimpre-
sión o uso no autorizado sin el consenti-
miento escrito de Yamaha Motor Co., Ltd.
Impreso en Japón.
5VJ-9-61-01 3/14/03 11:48 PM Page 11
Page 13 of 350

LOCATION OF THE WARNING AND
SPECIFICATION LABELS .......................1-1
SAFETY INFORMATION .........................2-1
DESCRIPTION AND MACHINE
IDENTIFICATION.....................................3-1
Identification number records ...............3-3
Key identification number .....................3-5
Vehicle identification number ...............3-5
Model label ...........................................3-7
CONTROL FUNCTIONS..........................4-1
Main switch ...........................................4-1
Indicator lights ......................................4-3Handlebar switches ..............................4-5
Throttle lever ........................................4-9
Speed limiter ......................................4-11
Front brake lever ................................4-13
Rear brake lever .................................4-13
Parking brake .....................................4-15
Drive select lever ................................4-17
Fuel tank cap ......................................4-17
Fuel cock ............................................4-19
Starter (choke) ....................................4-21
Seat ....................................................4-23
PRE-OPERATION CHECKS ...................5-1
Front and rear brakes ...........................5-5
Fuel ......................................................5-7
EBU00015
CONTENTS
1
2
3
45
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Page 14 of 350

Engine and transmission oil ...............5-11
Chain ..................................................5-15
Throttle lever ......................................5-15
Fittings and fasteners .........................5-17
Lights ..................................................5-17
Switches .............................................5-17
Battery ................................................5-17
Tires ...................................................5-19
How to measure tire pressure ............5-23
Tire wear limit .....................................5-25
OPERATION ............................................6-1
Starting a cold engine ...........................6-3
Starting a warm engine ......................6-11
Warming up ........................................6-11
Drive select lever operation and reverse
driving ...............................................6-13
Engine break-in ..................................6-19Parking ...............................................6-23
Parking on a slope ..............................6-25
Accessories and loading ....................6-27
Riding Your ATV ......................................7-1
Getting to know your ATV.....................7-3
Ride with care and good
judgement ...........................................7-5
Be careful where you ride ...................7-29
Turning your ATV ...............................7-41
Climbing uphill ....................................7-45
Riding downhill ...................................7-57
Crossing a slope .................................7-61
Crossing through shallow water .........7-65
Riding over rough terrain ....................7-69
Sliding and skidding ...........................7-71
What to do if .......................................7-75
What to do ..........................................7-75
6
7
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Page 15 of 350

PERIODIC MAINTENANCE AND
ADJUSTMENT .........................................8-1
Owner’s manual and tool kit .................8-3
Periodic maintenance/Lubrication ........8-7
Engine oil ............................................8-13
Transmission oil .................................8-21
Spark plug inspection .........................8-27
Engine and V-belt compartment
air filter element cleaning .................8-31
Idle speed adjustment ........................8-41
Valve clearance adjustment ...............8-43
Throttle lever adjustment ....................8-43
Front and rear brake shoe
inspection .........................................8-45
Front brake lever free play
adjustment ........................................8-47
Rear brake adjustment .......................8-55
Drive chain slack check ......................8-57
Drive chain slack adjustment ..............8-59Lubricating and drive chain ................8-63
Draining the V-belt compartment ........8-65
Cable inspection and lubrication ........8-67
Brake lever lubrication ........................8-69
Knuckle shaft, lower arms and
steering shaft lubrication ..................8-69
Wheel removal ...................................8-71
Wheel installation ...............................8-71
Battery ................................................8-73
Replenishing the battery fluid .............8-77
Fuse replacement ...............................8-81
Replacing the headlight bulb ..............8-83
Tail/brake light bulb replacement .......8-87
Headlight beam adjustment ................8-89
Troubleshooting ..................................8-91
Troubleshooting chart .........................8-958
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Page 16 of 350
CLEANING AND STORAGE....................9-1
A. CLEANING .......................................9-1
B. STORAGE ........................................9-7
SPECIFICATIONS .................................10-1
HOW TO USE THE CONVERSION
TABLE ....................................................11-19
10
11
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