warning YAMAHA YFM400F 2001 Workshop Manual

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With practice, over a period of time, skill at
controlled sliding can be developed. The ter-
rain should be chosen carefully before at-
tempting such maneuvers, since both stability
and control are reduced. Bear in mind that slid-
ing maneuvers should always be avoided on
extremely slippery surfaces such as ice, since
all control may be lost.
WARNING
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such
as ice, go slowly and be very cautious in order
to reduce the chance of skidding or sliding outof control.

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PERIODIC MAINTENANCE AND
ADJUSTMENT
Periodic inspection, adjustment and lubrica-
tion will keep your machine in the safest and
most efficient condition possible. Safety is an
obligation of the machine owner. The most im-
portant points of machine inspection, adjust-
ment 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 unless
otherwise specified. Have a Yamaha dealer
perform service if you are not familiar with
machine service.

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WARNING

Never modify this ATV through improper in-
stallation or use of accessories. Improper in-
stallation of accessories or modification of this
vehicle may cause changes in handling which
in some situations could lead to an accident.
All parts and accessories added to this vehicle
should be genuine Yamaha or equivalent com-
ponents designed for use on this ATV and
should be installed and used according to in-
structions. If you have questions, consult an
authorized Yamaha ATV dealer.

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Changing the coolant
WARNING
Wait for the engine and radiator to cool before
removing the radiator cap. You could be
burned by hot fluid and steam blown out un-
der pressure. Always put a thick rag over the
cap when opening. Allow any remaining pres-
sure to escape before completely removingthe cap.
1. Put the ATV on a level place.
2. Remove panels E and F. (See pages 8-27 ~
8-29 for removal and installation proce-
dures.)
3. Place a container under the engine and re-
move the coolant drain bolt. (Use a trough
or a similar object as shown to prevent
coolant from spilling on the footrest.)
4. Remove the front carrier and panel C. (See
pages 8-23 and 8-25 for removal and in-
stallation procedures.)
1. Trough
1. Feuille de papier repliée en forme de conduit
1. Pasante1. Coolant drain bolt
1. Boulon de vidange du liquide de refroidissement
1. Perno de drenaje del refrigerante

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3. Remove the air filter element, and sepa-
rate it from the guide.
4. Wash the element gently but thoroughly
in solvent.
WARNING
Always use parts cleaning solvent to clean the
air filter element. Never use low flash point
solvents or gasoline to clean the air filter ele-
ment because the engine could catch fire orexplode.
5. Squeeze the excess solvent out of the fil-
ter and let it dry.CAUTION:Do not twist the filter element when squeez-ing it.
6. Inspect the element. If damaged, replace
it.
7. Apply SAE 10W30 motor oil to the ele-
ment.NOTE:The element should be wet but not dripping.
1. Air filter element
1. Élément de filtre à air
1. Elemento del filtro de aire1. Air filter guide
1. Guide de filtre à air
1. Filtro de aire guía

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Front brake adjustment
The front brake lever should have a free play of
zero mm at the lever end. If not, ask a Yamaha
dealer to adjust it.
WARNING
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:l
Make sure the brakes operate smoothly
and that the free play is correct.
l
Make sure the brakes do not drag.
l
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.
a. Free play
a. Jeu
a. Juego libre

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WARNING
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:l
Make sure the brakes operate smoothly
and that the free play is correct.
l
Make sure the brakes do not drag.
l
All air must be bled from the brake sys-
tem.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.

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Cable inspection and lubrication
WARNING
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer
covering of control cables becomes damaged.
Cables can also become frayed or kinked. Op-
eration of controls could be restricted, whichcould cause an accident or injury.
Lubricate the inner cables and the cable ends.
If the cables do not operate smoothly, ask a
Yamaha dealer to replace them.
Recommended lubricant:
Engine oil

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WARNING
Battery electrolyte is poisonous and danger-
ous, causing severe burns, etc. It contains sul-
furic acid. Avoid contact with skin, eyes or
clothing.
Antidote:l
EXTERNAL: Flush with water.
l
lNTERNAL: Drink large quantities of wa-
ter or milk. Follow with milk of magnesia,
beaten egg or vegetable oil. Call a physi-
cian immediately.
l
EYES: Flush with water for 15 minutes
and get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flame, cigarettes or other sources of ig-
nition away. Ventilate when charging or using
in an enclosed space. Always shield your eyes
when working near batteries.
KEEP OUT OF REACH OF CHILDREN.

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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 couldlead to a fire.CAUTION:To prevent accidental short-circuiting, turn off
the main switch when checking or replacing afuse.
1. Headlight fuse
2. Ignition fuse
3. Auxiliary DC jack fuse
4. Four-wheel-drive fuse
5. Signal fuse
6. Spare fuse (´ 3)
1. Fusible principal
2. Fusible d’allumage
3. Fusible de connecteur pour accessoires
4. Fusible du système 4x4
5. Fusible de signalisation
6. Fusible de rechange (´ 3)
1. Fusible del faro
2. Fusible del sistema de encendido
3. Fusible de la toma de CC auxiliar
4. Fusible del sistema de tracción en las cuatro ruedas
5. Fusible señalización
6. Fusible de repuesto (´ 3)