2004 YAMAHA BEAR TRACKER 250 Start

8-11
SBU00262
MANTENIMIENTO/LUBRICACION PERIODICOS
ELEMENTO OPERACIÓNINICIAL CADA
1
mes3
meses6
meses6
meses1
año
Válvulas* Compruebe el juego de válvulas.
Ajuste si es necesario.
BujíaCompruebe el estado de la(s) bujía(s).
Ajuste la separación de los electrodos y limpie.
Reemplace si es necesario.Elemento del filtro de aireLimpie.
Sustituir si es necesario.Cada 20–40 horas
(Con may o frequencia en condiciones
en las que exista polva)
Carburador*Compruebe el funcionamiento del estárter (estrangulador).
Ajuste la velocidad de ralentí.Sistema del respiradero de la
cubierta de la culata de
cilindros*Compruebe si hay grietas o daños en la manguera del respirade-
ro.
Reemplace si es necesario.Sistema de escape*Compruebe si hay fugas.
Vuelva a apretar si es necesario.
Reemplace la empaquetadura si es necesario.Tubería de combustible*Compruebe posible existencia de daños y grietas en la
tubería de combustible.
Sustituir si es necesario.Aceite del motorSustituir (calentar el motor antes de drenar el aceite).Elemento del filtro de aceite del
motorLimpie.Filtro tamiz de aceite del
motorLimpie.Aceite de la transmisión
finalCompruebe el nivel de aceite/fugas de aceite.
Reemplace.Freno delanteros*Compruebe el funcionamiento/posible existencia de fugas de
líquido/ver NOTA 8-12.
Corrija si es necesario.Freno trasero*Compruebe funcionamiento.
Ajuste si es necesario.U4XE65.book Page 11 Tuesday, May 6, 2003 1:38 PM

8-39 1. Throttle stop screw
1. Vis d’arrêt de l’accélérateur
1. Tornillo de tope del acelerador
EBU13020
Idle speed adjustmentNOTE:_ A diagnostic tachometer must be used for this pro-
cedure. _1. Start the engine and warm it up for a few min-
utes at approximately 1,000 to 2,000 r/min.
Occasionally rev the engine to 4,000 to
5,000 r/min. The engine is warm when it
quickly responds to the throttle.
2. Connect the tachometer to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction
a to in-
crease the engine speed, and in direction
b
to decrease the engine speed.
Specified idle speed:
1,400–1,500 r/min
U4XE65.book Page 39 Tuesday, May 6, 2003 1:38 PM

8-79 1. Headlight cover 2. Screw (× 3)
1. Cache de phare 2. Vis (× 3)
1. Carenado del faro 2. Tornillo (× 3)
1. Bulb holder cover (× 2) 2. Bulb holder
1. Cache de la fixation d’ampoule (× 2) 2. Fixation d’ampoule
1. Cubierta del portabombilla (× 2) 2. Portabombilla
EBU10711
Replacing a headlight bulb
If a headlight bulb burns out, replace the bulb as
follows.
1. Remove the headlight cover by removing the
screws.
2. Remove the bulb holder cover.
3. Turn the bulb holder counterclockwise to re-
move the defective bulb.
WARNING
_ The headlight bulb is hot when it is on and im-
mediately after it is turned off. Wait for the bulb
to cool before touching or removing it. You can
be burned or a fire could start if the bulb touch-
es something flammable. _
U4XE65.book Page 79 Tuesday, May 6, 2003 1:38 PM

8-87
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid in-
spection before shipment from the factory, trouble
may occur during operation.
Any problem in the fuel, compression, or ignition
systems can cause poor starting and loss of pow-
er. The troubleshooting chart describes a quick,
easy procedure for making checks. If your ma-
chine requires any repair, take it to a Yamaha
dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to prop-
erly service your machine. Use only genuine
Yamaha parts on your machine. Imitation parts
may look like Yamaha parts, but they are often in-
ferior. Consequently, they have a shorter service
life and can lead to expensive repair bills.
WARNING
Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe in-
jury or property damage. Make sure there are
no open flames or sparks in the area, including
pilot lights from water heaters or furnaces.
U4XE65.book Page 87 Tuesday, May 6, 2003 1:38 PM

8-89
EBU00440Troubleshooting chart
1. Fuel
Check if there is fuel
in the fuel tank.There is fuel.Turn the fuel cock
lever to “OFF”.
Turn the fuel cock
lever to “ON”. Remove the
fuel hose. No fuel.
Clean fuel
cock. Some fuel.Turn the fuel
cock to “RES”.Restart engine.
No fuel.Supply fuel.
2. Compression
Use electric starter to
see if there is
compression.There is compression.
Compression normal.
No compression.Ask a Yamaha dealer to
inspect.
3. Ignition
Remove spark plug and
check electrodes.
WetWipe clean with dry cloth.
DryAttach spark plug cap and
ground to chassis.Use the
electric starter.Spark good.Ignition system
normal.
Spark weak.
Adjust plug gap
or replace plug. No spark.
Ask a Yamaha dealer to
inspect. 4. Battery
Use electric starter.Engine turns over
quickly.Battery good.
Engine turns over
slowly.Check fluid, recharge,
check connections.Check fuel
flow.
Fuel cock
clogged.
U4XE65.book Page 89 Tuesday, May 6, 2003 1:38 PM

9-5
7. Automotive type wax may be applied to all
painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish.
When finished, start the engine and let it idle for
several minutes.
WARNING
Wet brakes may have reduced stopping ability,
increasing the chance of an accident. Test the
brakes after washing. Apply the brakes several
times at slow speeds to let friction dry out the
linings.
U4XE65.book Page 5 Tuesday, May 6, 2003 1:38 PM

10-2
10
Starting system Electric starter and recoil starter
Lubrication system Wet sump
Engine oil:
Type
Recommended engine oil classification: API Service SE, SF, SG type or higher
Quantity:
Without oil filter element removal 1.5 L
With oil filter element removal 1.6 LModel YFM250X
-20˚ -10˚ 0˚
10˚20˚ 30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
CAUTION:
In order to prevent clutch slippage (since the en-
gine oil also lubricates the clutch), do not mix any
chemical additives. Do not use oils with a diesel
specification of “CD” or oils of a higher quality
than specified. In addition, do not use oils labeled
“ENERGY CONSERVING II” or higher.
U4XE65.book Page 2 Tuesday, May 6, 2003 1:38 PM