2005 YAMAHA YFM350R engine

EBU00015
1-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
Handlebar switches .............................. 4-5
Start switch .......................................... 4-7
Throttle lever ........................................ 4-9
Speed limiter ...................................... 4-11
Clutch lever ........................................ 4-13
Brake lever ......................................... 4-13
Brake pedal ........................................ 4-15
Parking brake lever ............................ 4-17
Shift pedal .......................................... 4-21
1234
Drive select lever ............................... 4-21
Fuel tank cap ..................................... 4-23
Fuel cock............................................ 4-23
Starter (choke) .................................. 4-27
Seat.................................................... 4-29
Front shock absorber adjustment ...... 4-31
Rear shock absorber adjustment ....... 4-33
PRE-OPERATION CHECKS ................... 5-1
Front and rear brakes .......................... 5-5
Fuel ...................................................... 5-9
Engine oil ........................................... 5-13
Chain.................................................. 5-13
Throttle lever ...................................... 5-15
Fittings and fasteners......................... 5-15
Lights ................................................. 5-15
Switches............................................. 5-15
Tires ................................................... 5-17
How to measure tire pressure ............ 5-21
Tire wear limit..................................... 5-23
5
U5YT61.book Page 1 Wednesday, April 7, 2004 3:59 PM

OPERATION ............................................6-1
Starting a cold engine ...........................6-3
Starting a warm engine .........................6-9
Warming up...........................................6-9
Drive select lever operation and
reverse driving ..................................6-11
Shifting ................................................6-15
To start out and accelerate .................6-17
To decelerate ......................................6-21
Engine break-in ...................................6-23
Parking ................................................6-27
Parking on a slope ..............................6-27
Accessories and loading .....................6-31
RIDING YOUR ATV..................................7-1
Getting to know your ATV .....................7-3
Ride with care and good judgement .....7-5
Be careful where you ride ...................7-27
Turning your ATV ................................7-41
Climbing uphill.....................................7-47
Riding downhill ....................................7-57
Crossing a slope .................................7-61
Crossing through shallow water ..........7-65
Riding over rough terrain ....................7-69
Sliding and skidding ............................7-71
What to do if ........................................7-75
What to do...........................................7-75
67
PERIODIC MAINTENANCE AND
ADJUSTMENT ......................................... 8-1
Owner’s manual and tool kit ................. 8-3
Periodic maintenance/lubrication.......... 8-7
Engine oil and oil filter element........... 8-17
Spark plug inspection ......................... 8-29
Air filter element cleaning ................... 8-33
Carburetor adjustment ........................ 8-41
Idle speed adjustment ........................ 8-43
Throttle lever adjustment .................... 8-45
Valve clearance adjustment ............... 8-45
Front brake pad inspection ................. 8-47
Rear brake pad inspection.................. 8-47
Brake fluid level check ........................ 8-49
Brake fluid replacement ...................... 8-53
Front brake lever free play.................. 8-55
Brake pedal height adjustment ........... 8-57
Parking brake adjustment ................... 8-59
Adjusting the rear brake light switch ... 8-65
Clutch lever free play adjustment ....... 8-67
Drive chain slack check ...................... 8-69
Drive chain slack adjustment .............. 8-71
Lubricating the drive chain.................. 8-73
Cable inspection and lubrication......... 8-75
Brake and shift pedal/brake and
clutch lever lubrication ...................... 8-75
8
U5YT61.book Page 2 Wednesday, April 7, 2004 3:59 PM

2-1
SAFETY INFORMATION
EBU00193
AN ATV IS NOT A TOY AND CAN BE HAZARD-OUS TO OPERATE.
An ATV handles differently
from other vehicles including motorcycles and
cars. A collision or rollover can occur quickly, even
during routine maneuvers such as turning and
riding on hills or over obstacles, if you fail to take
proper precautions.
SEVERE INJURY OR DEATH can result if you do
not follow these instructions:


Read this manual and all labels carefully and
follow the operating procedures described.


Never operate an ATV without proper training
or instruction.


Always follow the age recommendation:
– A child under 16 years old should never oper-
ate an ATV with engine size greater than 90cc.
U5YT61.book Page 1 Wednesday, April 7, 2004 3:59 PM

2-17
WARNING
_

Always turn off the engine when refueling.


Do not refuel immediately 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 in the vicinity 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 ATV in another ve-
hicle, 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
swallow some gasoline or inhale a lot of
gasoline vapor, or get some gasoline in
your eyes, see your doctor immediately. If
gasoline spills on your skin, wash with
soap and water. If gasoline spills on your
clothing, change your clothes.
_
U5YT61.book Page 17 Wednesday, April 7, 2004 3:59 PM

2-19
WARNING
_ Always operate your ATV in an area with ade-
quate ventilation. Never start or run the engine
in a closed area. Exhaust fumes are poisonous
and may cause loss of consciousness and
death within a short time. _
U5YT61.book Page 19 Wednesday, April 7, 2004 3:59 PM

4-1
EBU00040
CONTROL FUNCTIONS
EBU00942
Main switch
Functions of the respective switch positions are as
follows:
ON:
The engine can be started only at this position and
the headlights and taillight come on when the light
switch is on.
OFF:
All electrical circuits are switched off. The key can
be removed in this position.
U5YT61.book Page 1 Wednesday, April 7, 2004 3:59 PM

4-5 1. Light switch “//OFF”
2. Engine stop switch “/”
3. Start switch “”
1. Contacteur d’éclairage “//OFF”
2. Coupe-circuit du moteur “/”
3. Contacteur du démarreur “”
1. Interruptor de luces “//OFF”
2. Interruptor de paro del motor “/”
3. Interruptor de arranque “”
EBU00053
Handlebar switches
EBU12040
Light switch “/ /OFF”
Set the switch to “” to turn on the low beam and
the taillight.
Set the switch to “” to turn on the high beam
and the taillight.
Set the switch to “OFF” to turn off all the lights.CAUTION:_ Do not use the headlights with the engine
turned off for more than thirty minutes. The
battery may discharge to the point that the
starter motor will not operate properly. If this
should happen, remove the battery and re-
charge it. _
U5YT61.book Page 5 Wednesday, April 7, 2004 3:59 PM

4-7 1. Light switch “//OFF”
2. Engine stop switch “/”
3. Start switch “”
1. Contacteur d’éclairage “//OFF”
2. Coupe-circuit du moteur “/”
3. Contacteur du démarreur “”
1. Interruptor de luces “//OFF”
2. Interruptor de paro del motor “/”
3. Interruptor de arranque “”
EBU12050
Engine stop switch “/”
Make sure that the engine stop switch is set to
“” before starting the engine. The engine stop
switch controls ignition and can be used at all
times to stop the engine, especially in an emer-
gency. The engine will not start or run when the
engine stop switch is set to “”.
EBU06070
Start switch “”
The starter motor cranks the engine when this
switch is pushed.CAUTION:_ See starting instructions prior to starting the
engine. (See page 6-3 for details.) _
U5YT61.book Page 7 Wednesday, April 7, 2004 3:59 PM