2001 YAMAHA YFM400F brakes

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CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ....................... 1-1
SAFETY INFORMATION ........................ 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION .................................... 3-1
Identification number records ........... 3-3
Key identification number ................. 3-5
Vehicle identification number ........... 3-5
Model label ......................................... 3-7
CONTROL FUNCTIONS ......................... 4-1
Main switch......................................... 4-1
Indicator lights .................................... 4-3
Coolant temperature indicator light
checking method .............................. 4-7
Speedometer .................................... 4-11
Fuel gauge ........................................ 4-13
Handlebar switches .......................... 4-15
Throttle lever .................................... 4-21
Speed limiter .................................... 4-23
Front brake lever .............................. 4-25Rear brake pedal and lever.............. 4-27
Drive select lever .............................. 4-29
Recoil starter..................................... 4-29
Fuel tank cap..................................... 4-31
Fuel cock ........................................... 4-33
Starter (choke) “ ” ........................ 4-35
Seat ................................................... 4-37
Storage box ...................................... 4-39
Front carrier ...................................... 4-39
Rear carrier ....................................... 4-39
Front shock absorber
adjustment...................................... 4-41
Rear shock absorber
adjustment...................................... 4-45
Auxiliary DC jack .............................. 4-49
PRE-OPERATION CHECKS .................... 5-1
Front and rear brakes......................... 5-7
Fuel .................................................... 5-11
Engine oil .......................................... 5-15
Final gear oil ..................................... 5-19
Differential gear oil .......................... 5-21
Throttle lever .................................... 5-21
Fittings and Fasteners...................... 5-21
1234
5

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Always check for obstacles before operat-
ing in a new area.
Never attempt to operate over large obsta-
cles, such as large rocks or fallen trees. Al-
ways follow proper procedures when
operating over obstacles as described in
this manual.
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Always be careful when skidding or sliding.
Learn to safely control skidding or sliding
by practicing at low speeds and on level,
smooth terrain. On extremely slippery sur-
faces, such as ice, go slowly and be very
cautious in order to reduce the chance of
skidding or sliding out of control.
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Never operate an ATV in fast flowing water
or in water deeper than that recommended
in this manual. Remember that wet brakes
may have reduced stopping ability. Test
your brakes after leaving water. If neces-
sary, apply them several times to let friction
dry out the linings.

5-1
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes
• Check operation, free play, fluid level and fluid leakage.
• Fill with DOT 4 brake fluid if necessary.5-7 ~ 5-9,
8-91 ~ 8-95
Fuel
• Check fuel level.
• Fill with fuel if necessary.5-11 ~ 5-13
Engine oil
• Check oil level.
• Fill with oil if necessary.5-15 ~ 5-17,
8-31 ~ 8-41
Coolant reservoir
• Check coolant level.
• Fill with coolant if necessary.8-53 ~ 8-63
Final gear oil/
Differential gear oil
• Check for leakage. 5-19, 8-41 ~ 8-51
Throttle
• Check for proper throttle cable operation. 5-21, 8-87
Wheels and tires
• Check tire pressure, wear and damage.5-25 ~ 5-31,
8-107 ~ 8-109
Fittings and Fasteners
• Check all fittings and fasteners. 5-21
Lights
• Check for proper operation. 5-23, 8-121 ~ 8-127
Front axle boots
• Check for damage. 8-63

5-7
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Front and rear brakes
1. Brake levers and brake pedal
Check for correct free play in the rear
brake lever and that there is no free play in
the front brake lever. If the free play is in-
correct, adjust it. (See pages 8-95 ~ 8-103.)
Check the operation of the levers and ped-
al. They should move smoothly and there
should be a firm feeling when the brakes
are applied. If not, have the machine in-
spected by a Yamaha dealer.
2. Brake fluid level
Check the brake fluid level.
Add fluid if necessary. (See pages 8-91 ~
8-95.)
3. Brake fluid leakage
Check to see if any brake fluid is leaking
out of the pipe joints or master cylinder.
Apply the brakes firmly for one minute. If
there is any leaking, have the machine in-
spected by a Yamaha dealer. Recommended brake fluid: DOT 4

5-9
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4. Brake operation
Test the brakes at slow speed after start-
ing out to make sure they are working
properly. If the brakes do not provide
proper braking performance, inspect the
brake pads for wear. (See page 8-89.)
WARNING

Always check the brakes at the start of every
ride. Do not ride the ATV if you find any prob-
lem with the brakes or you could lose braking
ability, which could lead to an accident. If a
problem cannot be corrected by the adjust-
ment procedures provided in this manual,
have the ATV inspected by a Yamaha dealer.

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1. Drive select lever
a. L (Low)
b. H (High)
c. N (Neutral)
d. R (Reverse)
e. P (Park)
1. Levier de présélection
a. L (Rapport inférieur)
b. H (Rapport supérieur)
c. N (Point mort)
d. R (Marche arrière)
e. P (Stationnement)
1. Palanca de selección de marcha
a. L (Baja)
b. H (Alta)
c. N (Punto muerto)
d. R (Marcha atrás)
e. P (Estacionamiento)
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Drive select lever operation and reverse driv-
ing
CAUTION:

Before shifting, you must stop the machine
and return the throttle lever to the closed posi-
tion. Otherwise, the transmission may be
damaged.
1. Shifting: Neutral to High and High to Low
a. Bring the machine to a complete stop and
return the throttle lever to the closed posi-
tion.
b. Apply the brakes, then shift by moving the
drive select lever along the shift guide.
NOTE:

Make sure that the drive select lever is com-
pletely shifted into position.
c. Open the throttle lever gradually.

6-21
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Parking on a slope
WARNING
Avoid parking on hills or other inclines. Park-
ing on a hill or other incline could cause the
ATV to roll out of control, increasing the
chance of an accident. If you must park on an
incline, place the machine transversely across
the incline, apply the parking brake, and block
the front and rear wheels with rocks or other
objects. Do not park the ATV at all on hills that
are so steep you could not walk up them easi-ly.
1. Bring the machine to a stop by applying
the brakes.
2. Stop the engine.
3. With the rear brake applied, shift the drive
select lever to the park position.

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Select a large, flat area off-road to become fa-
miliar with your ATV. Make sure that this area
is free of obstacles and other riders. You
should practice control of the throttle, brakes,
shifting procedures, and turning techniques in
this area before trying more difficult terrain. Al-
ways avoid riding on paved surfaces: the ATV
is designed for off-road use only, and handling
maneuvers are more difficult to perform on
pavement.
Set the parking brake and follow the instruc-
tion on page 6-3 to start the engine. Once it has
warmed up you are ready to begin riding your
ATV. As you get on the ATV, be sure not to ac-
cidentally move the shift pedal. Remember
that the engine and exhaust pipe will be hot
when riding and afterwards; do not allow skin
or clothing to come in contact with these com-
ponents.