2003 YAMAHA YFM350R engine

4-11 1. Locknut 2. Adjusting screw a. 12 mm
1. Contre-écrou 2. Vis de réglage
1. Contratuerca 2. Tornillo de ajuste
EBU01198
Speed limiter
The speed limiter keeps the throttle from fully
opening, even when the throttle lever is pushed to
the maximum. Turning in the adjusting screw limits
the maximum engine power available and de-
creases 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 adjusting screw 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 8-39. _
U5NF62.book Page 11 Wednesday, May 8, 2002 1:40 PM

4-13 1. Clutch lever
1. Levier d’embrayage
1. Palanca de embrague
1. Brake lever
1. Levier de frein
1. Palanca del freno
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Clutch lever
The clutch lever is located on the left handlebar
and the ignition circuit cut-off system is incorporat-
ed in the clutch lever holder. Pull the clutch lever to
the handlebar to disengage the clutch, and release
the lever to engage the clutch. The lever should be
pulled rapidly and released slowly for smooth
clutch operation. (Refer to “Starting a cold engine”
for a description of the ignition circuit cut-off sys-
tem.)
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Brake lever
The brake lever is located on the right handlebar.
Pull it toward the handlebar to apply the front
brake.
U5NF62.book Page 13 Wednesday, May 8, 2002 1:40 PM

4-17 1. Button 2. Lock plate
1. Bouton 2. Verrou
1. Botón 2. Placa de bloqueo
1. Locked position
1. Position verrou bloqué
1. Posición bloqueada
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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.
Squeeze the clutch lever while pushing the button,
then push in the lock plate to apply the parking
brake. Squeeze the clutch lever to release the
parking brake.NOTE:When the parking brake is used, engine speed is
limited to 2,300 r/min. Be sure the parking brake is
released before moving the throttle lever. Other-
wise, the engine will misfire, preventing normal op-
eration.
U5NF62.book Page 17 Wednesday, May 8, 2002 1:40 PM

4-19
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 con-
trol 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.
U5NF62.book Page 19 Wednesday, May 8, 2002 1:40 PM

4-21 1. Shift pedal
1. Pédale de sélection
1. Pedal del cambio
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 6-
speed transmission. The shift pedal is located on
the left side of the engine and is used in combina-
tion with the clutch when shifting.
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Drive select lever
The drive select lever is used for driving the machine
either forward or in reverse. Refer to page 6-11 for
drive select lever operation.
U5NF62.book Page 21 Wednesday, May 8, 2002 1:40 PM

4-23 1. Fuel tank cap
1. Bouchon de réservoir de carburant
1. Tapón del depósito de combustible
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Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
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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.
U5NF62.book Page 23 Wednesday, May 8, 2002 1:40 PM

4-25 A. Starter (choke) 1. Fully open
2. Half open 3. Closed
A. Starter (enrichisseur) 1. Complètement ouvert
2. Mi-ouvert 3. Fermé
A. Starter (choke) 1. Abre completamente
2. Semiabierto 3. Cerrado
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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.)
U5NF62.book Page 25 Wednesday, May 8, 2002 1:40 PM

5-1
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
BrakesCheck operation, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-41–8-51
ClutchCheck operation, condition and lever free play. 8-59
Parking brakeCheck operation, condition and cable length. 8-53–8-55
FuelCheck fuel level.
Fill with fuel if necessary.5-9–5-11
Engine oilCheck oil level.
Fill with oil if necessary.5-13–5-15,
8-15–8-23
Drive chainCheck chain slack and condition.
Adjust if necessary.5-15, 8-61–8-65
ThrottleCheck for proper throttle cable operation and free play. 5-17, 8-39
Wheels and tiresCheck tire pressure, wear and damage.5-19–5-25,
8-73–8-75
Fittings and fastenersCheck all fittings and fasteners. 5-17
Lights and switchesCheck for proper operation. 5-17, 8-57, 8-87–8-97
BatteryCheck fluid level.
Fill with distilled water if necessary.5-19, 8-77–8-83
U5NF62.book Page 1 Wednesday, May 8, 2002 1:40 PM