Page 5 of 380
FBU00946
INTRODUCTION
Félicitations pour l’achat du YFM350X de Yamaha. Ce
modèle représente le fruit de nombreuses années d’expé-
rience Yamaha dans la production de véhicules de sport,
de tourisme et de course. Ce véhicule permettra à son pi-
lote de pleinement apprécier la perfection technique et la
fiabilité qui ont fait de Yamaha un leader dans ces domai-
nes.
Ce manuel apporte une meilleure compréhension des ca-
ractéristiques et du fonctionnement du véhicule. Le ma-
nuel donne en outre des conseils importants relatifs à
la sécurité. Il informe sur les compétences et techni-
ques particulières indispensables au pilotage du véhi-
cule.
Ce manuel explique également les procédés d’ins-
pection et d’entretien élémentaires. Les concessionnaires
Yamaha sont au service de leur clientèle et répondront à
toute question concernant le fonctionnement ou l’entre-
tien de ce véhicule.
SBU00946
INTRODUCCIÓN
Le felicitamos por su compra de la Yamaha
YFM350X. Representa el resultado de muchos años
de experiencia de Yamaha en la producción de má-
quinas deportivas, de turismo, y de competición que
marcan el ritmo de las carreras. Con la compra de
esta Yamaha, podrá apreciar el alto grado de perfec-
ción técnica y fiabilidad que han convertido a
Yamaha en el líder de estos campos.
El presente manual le proporcionará un buen cono-
cimiento básico de las características y el manejo del
ATV.
También contiene indicaciones importan-
tes acerca de la seguridad y aporta información
sobre las técnicas y habilidades especiales ne-
cesarias para conducir el ATV, así como los pro-
cedimientos básicos de mantenimiento e ins-
pección. Si tiene alguna duda respecto al
mantenimiento o manejo del ATV, consulte a su con-
cesionario Yamaha.
U5NF63.book Page 3 Wednesday, March 12, 2003 10:06 AM
Page 91 of 380
4-26
FBU00094
Starter (enrichisseur)
La mise en marche à froid requiert un mélange air-carbu-
rant plus riche.
C’est le starter qui remplit cette fonction d’enrichisse-
ment du mélange.
Déplacer dans la direction a
pour mettre le starter (enri-
chisseur) en service.
Déplacer dans la direction b
pour mettre le starter (en-
richisseur) hors service.
La marche à suivre correcte est décrite à la section “Mise
en marche d’un moteur froid”. (Pour plus de détails, voir
page 6-4.)
SBU00094
Starter (choke)
Cuando el motor está frío, requiere una mezcla más
rica de combustible para arrancar.
Esta mezcla se suministra a través de un circuito se-
parado, el circuito del “starter”.
Mueva en la dirección
a para conectar el starter
(choke).
Mueva en la dirección
b
para desconectar el starter
(choke).
Consulte el apartado de “Arranque en frío del motor”
para ver la operación adecuada. (Consulte la
página 6-4.)
U5NF63.book Page 26 Wednesday, March 12, 2003 10:06 AM
Page 96 of 380
4-31 1. Spring preload adjusting ring
2. Locknut
1. Anneau de réglage de la précontrainte de ressort
2. Contre-écrou
1. Anillo de ajuste de precarga del resorte
2. Contratuerca
EBU11651
Rear shock absorber adjustment
The spring preload and damping force of the rear
shock absorber can be adjusted to suit the rider’s
weight and riding conditions.
WARNING
_ This shock absorber contains highly pressur-
ized nitrogen gas. Read and understand the
following information before handling the
shock absorber.
Do not tamper with or attempt to open the
cylinder assembly.
Do not subject the shock absorber to an
open flame or other high heat source. This
may cause the unit to explode due to ex-
cessive gas pressure.
Do not deform or damage the cylinder in
any way. Cylinder damage will result in
poor damping performance.
Take the shock absorber to a Yamaha deal-
er for any service.
_Adjust the spring preload as follows:
1. Loosen the locknut.
2. Turn the adjusting ring in direction
a to in-
crease the spring preload and in direction
b
to decrease the spring preload.
U5NF63.book Page 31 Wednesday, March 12, 2003 10:06 AM
Page 118 of 380
5-15
EBU01083
Throttle lever
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
the idle position when released. Have a Yamaha
dealer repair as necessary for proper operation.
EBU01162
Fittings and fasteners
Always check the tightness of chassis fittings and
fasteners before a ride. Take the machine to a
Yamaha dealer or refer to the Service Manual for
correct tightening torque.
EBU01003
Lights
Check the headlights and tail/brake light to make
sure they are in working condition. Repair as nec-
essary for proper operation.
EBU01170
Switches
Check the operation of all switches. Have a
Yamaha dealer repair as necessary for proper op-
eration.
U5NF63.book Page 15 Wednesday, March 12, 2003 10:06 AM
Page 244 of 380
8-1
EBU00516
PERIODIC MAINTENANCE AND
ADJUSTMENTPeriodic inspection, adjustment and lubrication will
keep your machine in the safest and most efficient
condition possible. Safety is an obligation of the
machine owner. The most important points of ma-
chine inspection, adjustment and lubrication are
explained on the following pages.
WARNING
Never service an engine while it is running.
Moving parts can catch clothing or parts of the
body, causing injury. Electrical components
can cause shocks or can start fires. Turn off
the engine when performing maintenance un-
less otherwise specified. Have a Yamaha deal-
er perform service if you are not familiar with
machine service.
U5NF63.book Page 1 Wednesday, March 12, 2003 10:06 AM
Page 246 of 380
8-3 1. Owner’s manual
2. Low-pressure tire gauge
3. Owner’s tool kit
1. Manuel du propriétaire
2. Manomètre basse pression pour pneus
3. Trousse à outils
1. Manual del propietario
2. Manómetro de baja presión
3. Equipo de herramientas
EBU01222
Owner’s manual and tool kit
You are recommended to put this owner’s manual
and low-pressure tire gauge in the vinyl bag and
always carry them along with the owner’s tool kit
under the seat. The service information included in
this manual is intended to provide you, the owner,
with the necessary information for completing your
own preventive maintenance and minor repairs.
The tools provided in the owner’s tool kit are suffi-
cient for this purpose, except that a torque wrench
is also necessary to properly tighten nuts and
bolts.NOTE:_ If you do not have a torque wrench available dur-
ing a service operation requiring one, take your
machine to a Yamaha dealer to check the torque
settings and adjust them as necessary. _
U5NF63.book Page 3 Wednesday, March 12, 2003 10:06 AM
Page 251 of 380
8-8 * It is recommended that these items be serviced by a Yamaha dealer.
** Lithium-soap-based grease
NOTE:
Recommended brake fluid: DOT 4
Brake fluid replacement:
1. When disassembling the master cylinders or calipers, replace the brake fluid. Normally check the
brake fluid level and add fluid as required.
2. On the inner parts of the master cylinders and calipers, replace the oil seals every two years.
3. Replace the brake hoses every four years, or if cracked or damaged.
Steering system*Check operation.
Repair if damaged.
Check toe-in.
Adjust if necessary.Front and rear
suspension*Check operation.
Correct if necessary.Upper and lower arm
pivot and steering shaft*Lubricate every 6 months.**Rear arm pivot*
Lubricate every 6 months.**Fittings and fasteners*Check all chassis fittings and fasteners.
Correct if necessary.Battery*Check specific gravity.
Check breather hose for proper routing.
Correct if necessary.Lights and switches*Check operation.
Adjust headlight beam.
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
U5NF63.book Page 8 Wednesday, March 12, 2003 10:06 AM
Page 282 of 380
8-39 1. Locknut 2. Adjusting bolt
a. Throttle lever free play
1. Contre-écrou 2. Boulon de réglage
a. Jeu du levier d’accélération
1. Contratuerca 2. Perno de ajuste
a. Juego libre de la palanca del acelerador
EBU00307
Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjusting the
throttle lever free play.1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle lever
free play is 3–5 mm.
3. Tighten the locknut.
EBU00303
Valve clearance adjustment
The correct valve clearance changes with use, re-
sulting in improper fuel/air supply or engine noise.
To prevent this, the valve clearance must be ad-
justed regularly. This adjustment however, should
be left to a professional Yamaha service techni-
cian.
U5NF63.book Page 39 Wednesday, March 12, 2003 10:06 AM
