2005 YAMAHA BRUIN 250 light

7-61
CROSSING A SLOPE
Traversing a sloping surface on your ATV requires
you to properly position your weight to maintain
proper balance. Be sure that you have learned the
basic riding skills on flat ground before attempting
to cross a sloping surface. Avoid slopes with slip-
pery surfaces or rough terrain that may upset your
balance.
As you travel across a slope, lean your body in the
uphill direction. It may be necessary to correct the
steering when riding on loose surfaces by pointing
the front wheels slightly uphill. When riding on
slopes be sure not to make sharp turns either up or
down hill.
U1P060.book Page 61 Monday, August 2, 2004 12:19 PM

8-9 * It is recommended that these items be serviced by a Yamaha dealer.
NOTE:

Recommended brake fluid: DOT 4


Brake fluid replacement:
When disassembling the master cylinder or caliper, replace the brake fluid. Normally check the
brake fluid level and add fluid as required.
On the inner parts of the master cylinder and caliper, replace the oil seals every two years.
Replace the brake hoses every four years, or if cracked or damaged.
Battery*Check specific gravity.
Check that the breather hose is routed correctly.
Correct if necessary.Lights and switches*Check operation.
Adjust headlight beams.
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
month136612
km
(mi)320
(200)1,200
(750)2,400
(1,500)2,400
(1,500)4,800
(3,000)
hours 20 75 150 150 300
U1P060.book Page 9 Monday, August 2, 2004 12:19 PM

8-37 1. Spark plug cap
1. Capuchon de bougie
1. Tapa de bujía
1. Spark plug wrench
1. Clé à bougie
1. Llave de bujía
EBU14550
Spark plug inspection
Removal
1. Remove the spark plug cap.
2. Use the spark plug wrench in the owner’s tool
kit to remove the spark plug as shown.
Inspection
The spark plug is an important engine component
and is easy to inspect. The condition of the spark
plug can indicate the condition of the engine.
The ideal color on the white insulator around the
center electrode is a medium-to-light tan color for
an ATV that is being ridden normally.
Do not attempt to diagnose such problems your-
self.
Instead, take the ATV to a Yamaha dealer. You
should periodically remove and inspect the spark
plug because heat and deposits will cause the
spark plug to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon and
other deposits are excessive, you should replace
the spark plug with the specified plug.
U1P060.book Page 37 Monday, August 2, 2004 12:19 PM

8-47
7. Tap the air filter element lightly to remove
most of the dust and dirt. Blow out the re-
maining dirt with compressed air as shown. If
the air filter element is damaged, replace it.NOTE:_ Check the foam cover for damage and replace it if
necessary. _8. Install the foam cover onto the air filter ele-
ment.
9. Install the air filter element.
10. Install the air filter case cover by fastening the
holders.
11. Install the seat.NOTE:_ The air filter element should be cleaned every 20–
40 hours. It should be cleaned more often if the
ATV is operated in extremely dusty areas. Each
time air filter element maintenance is performed,
check the air inlet to the air filter case for obstruc-
tions. Check the air filter element rubber joint to the
carburetor and manifold fittings for an airtight seal.
Tighten all fittings securely to avoid the possibility
of unfiltered air entering the engine. _
U1P060.book Page 47 Monday, August 2, 2004 12:19 PM

8-73 1. Rear brake light switch
2. Adjusting nut
1. Contacteur de feu stop sur frein arrière
2.Écrou de réglage
1. Interruptor de la luz de freno trasero
2. Tuerca de ajuste
EBU15420
Adjusting the rear brake light switch
The rear brake light switch, which is activated by
the brake pedal and rear brake lever, is properly
adjusted when the brake light comes on just be-
fore braking takes effect. If necessary, adjust the
brake light switch as follows.
1. Remove the footboard. (See page 8-21.)
2. Turn the adjusting nut while holding the rear
brake light switch in place. To make the brake
light come on earlier, turn the adjusting nut in
direction
a. To make the brake light come on
later, turn the adjusting nut in direction
b.
3. Install the footboard.
U1P060.book Page 73 Monday, August 2, 2004 12:19 PM

8-95 1. Headlight bulb holder cover
1. Cache d’ampoule de phare
1. Cubierta de la bombilla del faro
1. Headlight bulb holder
1. Fixation d’ampoule
1. Portabombilla
EBU14680
Replacing a headlight bulb
If a headlight bulb burns out, replace it as follows.
1. Remove the bulb holder cover at the rear of
the headlight by pulling it off.
2. Remove the headlight bulb holder by turning
it counterclockwise.
3. Remove the defective bulb by unhooking the
headlight bulb holder tabs.
WARNING
_ A headlight bulb is hot when it is on and imme-
diately 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. _
U1P060.book Page 95 Monday, August 2, 2004 12:19 PM

8-97 1. Headlight bulb holder tab (× 2)
1. Languette de fixation d’ampoule de phare (× 2)
1. Lengüeta del portabombillas del faro (× 2)
1. Do not touch the glass part of the bulb.
1. Ne pas toucher le verre de l’ampoule.
1. No tocar la parte de cristal de la bombilla.
4. Insert a new headlight bulb into the bulb hold-
er, and then secure the bulb by hooking the
tabs onto the bulb.CAUTION:_ Do not touch the glass part of the headlight
bulb to keep it free from oil, otherwise the
transparency of the glass, the luminosity of the
bulb, and the bulb life will be adversely affect-
ed. Thoroughly clean off any dirt and finger-
prints on the headlight bulb using a cloth
moistened with alcohol or thinner. _5. Install the headlight bulb holder by turning it
clockwise.
6. Install the headlight bulb holder cover at the
rear of the headlight.
U1P060.book Page 97 Monday, August 2, 2004 12:19 PM

8-99 1. Adjusting screw
1. Vis de réglage
1. Tornillo de ajuste
1. Bulb holder
1. Fixation d’ampoule
1. Portabombilla
EBU01089
Headlight beam adjustmentCAUTION:
It is advisable to have a Yamaha dealer make
this adjustment. To raise the beam, turn the adjusting screw in
direction
a.
To lower the beam, turn the adjusting screw in
direction
b.
EBU08610
Tail/brake light bulb replacement
1. Remove the bulb holder (together with the
bulb) by turning it counterclockwise.
U1P060.book Page 99 Monday, August 2, 2004 12:19 PM