light YAMAHA BRUIN 350 2005 Owner's Manual

8-49
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.
Specified spark plug:
DR8EA (NGK)
U5UH61.book Page 49 Tuesday, April 20, 2004 10:10 AM

8-87 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 del freno trasero
2. Tuerca de ajuste
EBU01259
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 panel A. (See page 8-19 for panel
removal and installation procedures.)
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 panel.
U5UH61.book Page 87 Tuesday, April 20, 2004 10:10 AM

8-105 1. Headlight fuse
2. Ignition fuse
3. Terminal fuse (for optional auxiliary DC jack)
4. Four-wheel-drive fuse
5. Signaling system fuse
6. Spare fuse (× 3)
1. Fusible de phare
2. Fusible d’allumage
3. Fusible de la prise pour accessoires optionnelle
4. Fusible du système quatre roues motrices
5. Fusible du système de signalisation
6. Fusible de rechange (× 3)
1. Fusible del faro
2. Fusible del sistema de encendido
3. Fusible del terminal (para la toma de corriente de CC auxiliar
opcional)
4. Fusible del sistema de tracción en las cuatro ruedas
5. Fusible del sistema de señalización
6. Fusible de repuesto (× 3)
WARNING
_ Always use a fuse of the specified rating. Nev-
er use any type of material or object in place of
the proper fuse. An improper fuse can cause
damage to the electrical system which could
lead to a fire. _CAUTION:_ To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse. _
Specified fuses:
Main fuse: 30 A
Headlight fuse: 15 A
Ignition fuse: 15 A
Four-wheel-drive fuse: 3 A
Signaling system fuse: 10 A
Terminal fuse: 10 A
U5UH61.book Page 105 Tuesday, April 20, 2004 10:10 AM

8-107 1. Headlight bulb holder cover
1. Cache de la fixation de l’ampoule de phare
1. Cubierta del portabombillas de la bombilla del faro
1. Headlight bulb holder
1. Fixation d’ampoule
1. Porta bombillas del faro
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.
U5UH61.book Page 107 Tuesday, April 20, 2004 10:10 AM

8-109 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.
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. _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.
U5UH61.book Page 109 Tuesday, April 20, 2004 10:10 AM

8-111 1. Headlight beam adjusting screw
1. Vis de réglage du faisceau de phare
1. Tornillo de ajuste de la luz del faro
EBU01089
Headlight beam adjustmentCAUTION:_ It is advisable to have a Yamaha dealer make
this adjustment. _To raise the beam, turn the adjusting screw in di-
rection
a.
To lower the beam, turn the adjusting screw in di-
rection
b.
EBU01105
Tail/brake light bulb replacement
If the tail/brake light bulb burns out, have a
Yamaha dealer replace it.
U5UH61.book Page 111 Tuesday, April 20, 2004 10:10 AM

8-113
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.
U5UH61.book Page 113 Tuesday, April 20, 2004 10:10 AM

9-9
5. Tie a plastic bag over the exhaust pipe outlet
to prevent moisture from entering.
6. If storing in a humid or salt-air atmosphere,
coat all exposed metal surfaces with a light
film of oil. Do not apply oil to any rubber parts
or the seat cover.
7. Remove the battery and charge it. Store it in
a dry place and recharge it once a month. Do
not store the battery in an excessively warm
or cold place (less than 0°C or more than
30°C).NOTE:Make any necessary repairs before storing the
machine.
U5UH61.book Page 9 Tuesday, April 20, 2004 10:10 AM

10-5
Suspension:
Front suspension Double wishbone
Rear suspension Swingarm (monocross)
Shock absorber:
Front shock absorber Coil spring / oil damper
Rear shock absorber Coil spring / oil damper
Wheel travel:
Front wheel travel 160 mm
Rear wheel travel 180 mm
Electrical:
Ignition system DC-C.D.I.
Generator system A.C. magneto
Battery type YTX14AH
Battery voltage, capacity 12 V, 12 Ah
Headlight type: Krypton bulbModel YFM350FA
U5UH61.book Page 5 Tuesday, April 20, 2004 10:10 AM

10-6
Bulb voltage, wattage
× quantity:
Headlight 12 V, 30/30 W
× 2
Tail/brake light 12 V, 5/21 W
× 1
Meter lighting 14 V, 3 W
× 1
Neutral indicator light 12 V, 1.7 W
× 1
Reverse indicator light 12 V, 1.7 W
× 1
Oil temperature warning light 12 V, 1.7 W
× 1
Four-wheel-drive indicator light 12 V, 1.7 W
× 1
Fuse:
Main fuse 30 A
Headlight fuse 15 A
Ignition fuse 15 A
Terminal fuse 10 A
Four-wheel-drive fuse 3 A
Signaling system fuse 10 AModel YFM350FA
U5UH61.book Page 6 Tuesday, April 20, 2004 10:10 AM