2006 YAMAHA BRUIN 250 service

FBU00946
INTRODUCTION
Félicitations pour l’achat du YFM25BV 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
YFM25BV. Representa el resultado de muchos
años de experiencia de Yamaha en la producción de
máquinas 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 per-
fección 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 inspección.
Si tiene alguna duda respecto al mantenimiento o
manejo del ATV, consulte a su concesionario
Yamaha.
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4-26
FBU00950
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’enrichissement du mélange.
Déplacer dans la direction a
pour mettre le starter (enri-
chisseur) en service.
Déplacer dans la direction b
pour mettre le starter (enri-
chisseur) 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.)
SBU00950
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 separado, el circui-
to 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.)
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5-17
EBU11620
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.
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Lights
Check the headlights and tail/brake light to make
sure they are in working condition. Repair as nec-
essary for proper operation.
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Switches
Check the operation of all switches. Have a
Yamaha dealer repair as necessary for proper op-
eration.
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Battery
Check fluid level and fill if necessary. Use only dis-
tilled water if refilling is necessary. (See pages
8-85–8-91.)
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8-1
EBU00516
1-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.
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8-3 1. Owner’s manual 2. Owner’s tool kit
3. Low-pressure tire gauge
1. Manuel du propriétaire 2. Trousse à outils du propriétaire
3. Manomètre basse pression pour pneus
1. Manual del propietario
2. Juego de herramientas del propietario
3. Manómetro de baja presión
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Owner’s manual and tool kit
You are recommended to put this owner’s manual
in the vinyl bag and always carry it on the bottom
of the seat as shown. Put the owner’s tool kit and
low-pressure tire gauge under the seat.
The service information included in this manual is
intended to provide you, the owner, with the nec-
essary information for completing your own pre-
ventive maintenance and minor repairs. The tools
provided in the Owner’s tool kit are sufficient 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. _
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8-53 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
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.
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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 3.0–5.0 mm.
3. Tighten the locknut.
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8-61

Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reaction
and lead to poor brake performance.


Be careful that water does not enter the brake
fluid reservoir when refilling. Water will signifi-
cantly lower the boiling point of the fluid and
may result in vapor lock.


Brake fluid may deteriorate painted surfaces or
plastic parts. Always clean up spilled fluid im-
mediately.


Have a Yamaha dealer check the cause if the
brake fluid level goes down.
EBU11860
Brake fluid replacement
Complete fluid replacement should be done only
by trained Yamaha service personnel. Have a
Yamaha dealer replace the following components
during periodic maintenance or when they are
damaged or leaking.

Replace the oil seals every two years.


Replace the brake hoses every four years.
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8-63 1. Front brake lever
a. Front brake lever free play
1. Levier de frein avant
a. Jeu du levier de frein avant
1. Palanca del freno delantero
a. Juego de la palanca del freno delantero
EBU11880
Front brake lever free play
The front brake lever should have a free play of
zero mm at the lever end. If not, have a Yamaha
dealer check the brake system.
WARNING
_ Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly
and that the free play is correct.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
_
EE.book Page 63 Friday, May 27, 2005 5:00 PM