engine YAMAHA BIG BEAR PRO 400 2003 User Guide

4-17 1. Throttle lever
1. Levier d’accélération
1. Palanca de aceleración
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Throttle lever
Once the engine is running, movement of the
throttle lever will increase the engine speed.
Regulate the speed of the machine by varying the
throttle position. Because the throttle is spring-
loaded, the machine will decelerate, and the en-
gine will return to an idle any time the hand is re-
moved from the throttle lever.
Before starting the engine, check the throttle to be
sure it is operating smoothly. Make sure it returns
to the idle position as soon as the lever is released.
WARNING
Malfunction of the throttle could make it diffi-
cult to speed up or slow down when you need
to. This could cause an accident. Check the
operation of the throttle lever before you start
the engine. If the throttle does not work
smoothly, check for the cause. Correct the
problem before riding the ATV or consult a
Yamaha dealer.
EE.book Page 17 Monday, June 18, 2001 10:18 AM

4-19 1. Locknut 2. Adjuster a. 12 mm
1. Contre-écrou 2. Vis de réglage
1. Contratuerca 2. Ajuste
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Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed to
the maximum. Screwing in the adjuster limits the
maximum engine power available and decreases
the maximum speed of the ATV.
WARNING
Improper adjustment of the speed limiter and
throttle could cause throttle cable damage or
improper throttle operation. You could lose
control, have an accident or be injured. Do not
turn the speed adjuster out more than 12 mm
or the throttle cable could be damaged. Always
make sure the throttle lever free play is adjust-
ed to 3 ~ 5 mm. See page 8-55.
EE.book Page 19 Monday, June 18, 2001 10:18 AM

4-25 1. Lock plate
1. Verrou de stationnement
1. Placa de bloqueo
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Parking brake
Use the parking brake when you have to start the
engine or park the machine, especially on a slope.
Apply the rear brake lever and push down the lock
plate to apply the parking brake. Squeeze the rear
brake lever to release the parking brake.
WARNING


Always set the parking brake before start-
ing the engine. The ATV could start mov-
ing unexpectedly if the parking brake is not
applied. This could cause loss of control or
a collision.


Always be sure you have released the
parking brake before you begin to ride. The
brake could overheat if you ride the ATV
without releasing the parking brake. You
could lose braking performance which
could cause an accident. You could also
wear out the brakes prematurely.
EE.book Page 25 Monday, June 18, 2001 10:18 AM

4-27 1. Shift pedal N. Neutral position
1. Pédale de sélection N. Point mort
1. Pedal de cambio N. Posición de punto muerto
1. Drive select lever
1. Levier de présélection
1. Palanca de selección de gama
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Shift pedal
This machine is equipped with a constant-mesh
5-speed transmission. The shift pedal is located
on the left side of the engine. Neutral is at the bot-
tom position.
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Drive select lever
The drive select lever is used to shift your machine
into high, low or reverse. Refer to page 6-11 ~ 6-15
for the drive select lever operation.
EE.book Page 27 Monday, June 18, 2001 10:18 AM

4-29 1. Recoil starter
1. Lanceur à réenroulement
1. Arranque por tracción de cable
1. Fuel tank cap
1. Bouchon de réservoir de carburant
1. Tapón del depósito de combustible
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Recoil starter
Firmly grasp the handle and pull slightly until en-
gagement can be felt. Then pull forcefully, being
careful not to pull the rope all the way out.
WARNING
Put the transmission in neutral and set the
parking brake before starting the engine or the
ATV could start to move unexpectedly, which
could cause an accident.
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Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
EE.book Page 29 Monday, June 18, 2001 10:18 AM

4-31
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Fuel cock
The fuel cock supplies fuel from the fuel tank to the
carburetor.
The fuel cock has three positions.
OFF: With the lever in this position fuel will not
flow. Always turn the lever to this position
when the engine is not running.
ON: With the lever in this position, fuel flows to
the carburetor. Normal riding is done with
the lever in this position.
RES: This indicates reserve. If you run out of fuel
while riding, turn the lever to this position.
THEN FILL THE FUEL TANK AT THE
FIRST OPPORTUNITY. After refuelling, re-
turn the fuel cock lever to the “ON” position.
EE.book Page 31 Monday, June 18, 2001 10:18 AM

4-33
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Starter (choke) “”
Starting a cold engine requires a richer air-fuel
mixture. A separate starter circuit supplies this
mixture.
Move in direction
a to turn on the starter (choke).
Move in direction
b to turn off the starter (choke).
Refer to “Starting a cold engine” for proper opera-
tion. (See page 6-3.)
EE.book Page 33 Monday, June 18, 2001 10:18 AM

4-43 1. Auxiliary DC jack 2. Cap
1. Connecteur pour accessoires 2. Capuchon
1. Toma de CC auxiliar 2. Tapa
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Auxiliary DC jack
The auxiliary DC jack is located at the front right
side of the ATV. The auxiliary DC jack can be used
for suitable work lights, radios, etc. The auxiliary
DC jack can only be used when the main switch is
in the “ON” position.
1. Turn the headlight switch to the “OFF” posi-
tion.
2. Start the engine. (See pages 6-3 ~ 6-7.)
3. Open the auxiliary DC jack cap and insert the
accessory power plug into the jack.
4. When the auxiliary DC jack is not being used,
cover it with the cap. Maximum rated capacity for the auxiliary
DC jack:
DC 12 V, 120 W (10 A)
EE.book Page 43 Monday, June 18, 2001 10:18 AM

4-45
CAUTION:_

Do not use accessories requiring more
than the above maximum capacity. This
may overload the circuit and cause the
fuse to blow.


If accessories are used without the engine
running or with the headlight turned on,
the battery will lose its charge and engine
starting may become difficult.


Do not use an automotive cigarette lighter
or other accessories with a plug that gets
hot because the jack can be damaged.
_
EE.book Page 45 Monday, June 18, 2001 10:18 AM

5-1
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1-PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5 ~ 5-7,
8-55 ~ 8-73
Rear brakeCheck operation, pedal height and free play.
FuelCheck fuel level.
Fill with fuel if necessary.5-9 ~ 5-11
Engine oil/
Transfer gear oilCheck oil level.
Fill with oil if necessary.5-13 ~ 5-15,
8-13 ~ 8-25
Final gear oil/
Differential gear oilCheck for leakage. 5-17, 8-27 ~ 8-35
ThrottleCheck for proper throttle cable operation. 5-17, 8-55
Wheels and tiresCheck tire pressure, wear and damage.5-21 ~ 5-27,
8-79 ~ 8-83
Fittings and FastenersCheck all fittings and fasteners. 5-19
LightsCheck for proper operation. 5-19, 8-91 ~ 8-95
Axle bootsCheck operation. 8-35
EE.book Page 1 Monday, June 18, 2001 10:18 AM