2003 YAMAHA YFM350R ignition

2-17
WARNING


Always turn off the engine when refueling.


Do not refuel right after the engine has
been running and is still very hot.


Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never
refuel while smoking, or while in the vicini-
ty of sparks, open flames, or other sources
of ignition such as the pilot lights of water
heaters and clothes dryers. Gasoline can
catch fire and you could be burned.


When transporting the machine in another
vehicle, be sure it is kept upright and that
the fuel cock is in the “OFF” position. Oth-
erwise, fuel may leak out of the carburetor
or fuel tank.


Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gaso-
line vapor, or get some gasoline in your
eyes, see your doctor immediately. If gaso-
line spills on your skin, wash with soap
and water. If gasoline spills on your cloth-
ing, change your clothes.
U5NF62.book Page 17 Wednesday, May 8, 2002 1:40 PM

4-7 1. Light switch “LIGHTS”
2. Engine stop switch “ENG. STOP”
3. Start switch “START”
1. Contacteur d’éclairage “LIGHTS”
2. Coupe-circuit du moteur “ENG. STOP”
3. Contacteur du démarreur “START”
1. Interruptor de luces “LIGHTS”
2. Interruptor de paro del motor “ENG. STOP”
3. Interruptor de arranque “START”
EBU01158
Engine stop switch “ENG. STOP”
Make sure that the engine stop switch is in the
“RUN” position before starting the engine. The en-
gine stop switch controls ignition and can be used
at all times to stop the engine, especially in an
emergency. The engine will not start or run when
the engine stop switch is turned to “OFF”.
EBU00647
Start switch “START”
The starter motor cranks the engine when this
switch is pushed.CAUTION:
See the starting instructions on page 6-3 prior
to starting the engine.
U5NF62.book Page 7 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
EBU00069
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.)
EBU00988
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

6-5 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
NOTE:_ This model is equipped with an ignition circuit cut-
off system. The engine can be started under the
following conditions.

When the transmission is in neutral. At this
time the neutral indicator light should come
on. If the light does not come on, ask a
Yamaha dealer to inspect it.


When the clutch is disengaged with the trans-
mission and drive select lever in any position.
However, it is recommended to shift into neu-
tral before starting the engine.
_5. Use the starter (choke) in reference to the fig-
ure:
Position
1: Cold engine start-
ambient temperature below 5°C.
Position
2: Cold engine start-
ambient temperature at 0°C–30°C
and warming up position.
Position
3: Cold engine start-
ambient temperature above 25°C
and warm engine start position.
U5NF62.book Page 5 Wednesday, May 8, 2002 1:40 PM

8-79
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:
EXTERNAL: Flush with water.
INTERNAL: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten egg
or vegetable oil. Call a physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention. Batteries produce
explosive gases. Keep sparks, flame, ciga-
rettes or other sources of ignition away. Venti-
late when charging or using in an enclosed
space. Always shield your eyes when working
near batteries. KEEP OUT OF REACH OF CHIL-
DREN.
U5NF62.book Page 79 Wednesday, May 8, 2002 1:40 PM

8-99
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.
U5NF62.book Page 99 Wednesday, May 8, 2002 1:40 PM

8-101
EBU00440*
Troubleshooting chart1. Fuel
Check if there is fuel
in the fuel tank.There is fuel.Turn the fuel
cock to “OFF”.No fuel.Fuel cock
clogged.
Clean fuel
cock. Some fuel.Turn the fuel
cock to “RES”.Restart engine.
No fuel.Supply fuel.
2. Compression
Use the electric starter
to see if there is
compression.There is compression.
Compression normal.
No compression.Ask a Yamaha dealer to
inspect.
3. Ignition
Remove plug and
check electrodes.WetWipe clean with dry cloth.
DryAttach plug cap and
ground to chassis.Use the
electric starter.Spark good.Ignition system
normal.
Spark weak.
Adjust plug gap
or replace plug. No spark.
Ask a Yamaha dealer to
inspect. 4. Battery
Use the electric
starter.Engine turns over
quickly.Battery good.
Engine turns over
slowly.Check fluid, recharge,
check connections.Check fuel
flow.
Turn the fuel
cock to “ON”.
Remove the
fuel hose.
U5NF62.book Page 101 Wednesday, May 8, 2002 1:40 PM

10-5
Shock absorber:
Front
RearCoil spring / oil damper
Coil spring / gas-oil damper
Wheel travel:
Front
Rear200 mm
200 mm
Electrical:
Ignition system
Generator system
Battery type/voltage, capacityD.C. C.D.I.
A.C. magneto
GM12CZ-4A-2/12V, 12Ah
Headlight type: Krypton bulb
Bulb voltage, wattage
× quantity:
Headlight
Tail/brake light
Indicator light:
Neutral
Reverse12V, 30W/30W
× 2
12V, 5W/21W
× 1
12V, 3.4W
× 1
12V, 3.4W
× 1
Fuse: 15AMODEL YFM350X
U5NF62.book Page 5 Wednesday, May 8, 2002 1:40 PM