Page 41 of 134
5-3
5
EBU19540Fuel Make sure that there is sufficient fuel in the tank.
(See page 4-8.)
WARNING
EWB00520Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is overfilled,
fuel could spill out due to heat from the en-
gine or the sun.Be careful not to spill fuel, especially on the
engine or exhaust pipe which can cause a
fire and severe injury. Wipe up any spilled
fuel immediately.Do not refuel right after the engine has been
running and is still very hot.Be sure the fuel tank cap is closed securely.EBU19560Engine oil Make sure that the engine oil is at the specified lev-
el. Add oil as necessary. (See page 8-11.)
EBU19710Front and rear brakes Brake lever and brake pedalCheck that there is no free play in the brake le-
ver. If there is free play, have a Yamaha dealer
check the brake system.Check for correct brake pedal height. (See page
8-25.) If the pedal height is incorrect, have a
Yamaha dealer adjust it.Check the operation of the lever and pedal. They
should move smoothly and there should be a
firm feeling when the brakes are applied. If not,
have a Yamaha dealer check the brake system.
Brake fluid level
Check the brake fluid level. Add fluid if necessary.
(See page 8-23.)
Recommended brake fluid:
DOT 4
U5YT64E0.book Page 3 Monday, April 9, 2007 1:03 PM
Page 42 of 134
5-4
5Brake fluid leakage
Check to see if any brake fluid is leaking out of the
pipe joints or brake fluid reservoirs. Apply the
brakes firmly for one minute. If there is any leak-
age, have a Yamaha dealer check the brake sys-
tem.
Brake operation
Test the brakes at slow speed after starting out to
make sure they are working properly. If the brakes
do not provide proper braking performance, check
the brake pads for wear. (See page 8-22.)
WARNING
EWB00580Always 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, havea Yamaha dealer check for the cause.
EBU19761Throttle lever Check the operation of the throttle lever. It must
open smoothly and spring back to the idle position
when released. Have a Yamaha dealer correct if
necessary.EBU19770Drive chain Check the condition of the drive chain and check
the drive chain slack. Lubricate and adjust the
drive chain as necessary. (See page 8-29.)EBU19791Tires
WARNING
EWB00601Use of improper tires on this ATV, or operation
of this ATV with improper or uneven tire pres-
sure, may cause loss of control, increasing
your risk of accident.
Pay attention to the following.The tires listed below have been approved
by Yamaha Motor Co., Ltd. for this model.
Other tire combinations are not recommend-
ed.
U5YT64E0.book Page 4 Monday, April 9, 2007 1:03 PM
Page 43 of 134
5-5
5 Front:
Manufacturer/model:
DUNLOP/KT851B
Size:
AT21 x 7-10
Type:
Tubeless
Rear:
Manufacturer/model:
DUNLOP/KT877A
Size:
AT20 x 10-9
Type:
Tubeless
The tires should be set to the recommended
pressure:
Recommended tire pressure:
Front:
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Rear:
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Check and adjust tire pressures when the
tires are cold.
Tire pressures must be equal on both
sides.Tire pressure below the minimum speci-
fied could cause the tire to dislodge from
the rim under severe riding conditions.
Minimum tire pressure:
Front:
22.0 kPa (3.2 psi) (0.220 kgf/cm²)
Rear:
22.0 kPa (3.2 psi) (0.220 kgf/cm²)
Use no more than the following pressures
when seating the tire beads.
Maximum tire seating pressure:
Front:
250 kPa (36 psi) (2.5 kgf/cm²)
Rear:
250 kPa (36 psi) (2.5 kgf/cm²)
Higher pressures and fast inflation may
cause a tire to burst. Inflate the tires very
slowly and carefully.EBU19820Measuring the tire pressure Use the low-pressure tire gauge.
U5YT64E0.book Page 5 Monday, April 9, 2007 1:03 PM
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5-6
5
NOTE:The low-pressure tire gauge is included as stan-
dard equipment. Make two measurements of the
tire pressure and use the second reading. Dust or
dirt in the gauge could cause the first reading to beincorrect.
Set the tire pressure when the tires are cold. Set
the tire pressures to the following specifications:
EBU19830Tire wear limit Replace the tire when the tire groove decreases to
3 mm (0.12 in).
1. Low-pressure tire gauge
Recommended pressure:
Fro nt
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Rear
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Minimum:
Fro nt
22.0 kPa (3.2 psi) (0.220 kgf/cm²)
Rear
22.0 kPa (3.2 psi) (0.220 kgf/cm²)
Maximum:
Fro nt
28.0 kPa (4.1 psi) (0.280 kgf/cm²)
Rear
28.0 kPa (4.1 psi) (0.280 kgf/cm²)
U5YT64E0.book Page 6 Monday, April 9, 2007 1:03 PM
Page 45 of 134
5-7
5
EBU19840Chassis fasteners Make sure that all nuts, bolts and screws are prop-
erly tightened.EBU19850Instruments, lights and switches Check that all instruments, lights and switches are
working properly. Correct if necessary.1. Tire wear limitU5YT64E0.book Page 7 Monday, April 9, 2007 1:03 PM
Page 46 of 134
6-1
6
EBU19880
OPERATION
EBU19900Read the Owner’s Manual carefully before riding
the ATV.
WARNING
EWB00630Read the Owner’s Manual carefully to become
familiar with all controls in order to help pre-
vent any loss of control, which could cause an
accident or injury. If there is a control or func-
tion you do not understand, ask your Yamahadealer.EBU20161Starting a cold engine
WARNING
EWB00640Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-dent or collision.
CAUTION:ECB00150See the “Engine break-in” section on page 6-6prior to operating the engine for the first time.
1. Set the parking brake.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the engine
stop switch to “”.
4. Shift the transmission into neutral. The neutral
indicator light should come on. If the indicator
light does not come on, have a Yamaha deal-
er check the electrical circuit.NOTE:This model is equipped with an ignition circuit cut-
off system. The engine can be started under the
following conditions.The transmission is in neutral.The clutch is disengaged with the shift pedal and
the drive select lever in any position. However, it
is recommended to shift into neutral before start-ing the engine.
U5YT64E0.book Page 1 Monday, April 9, 2007 1:03 PM
Page 47 of 134
6-2
6 5. Use the starter (choke) in reference to the fig-
ure:
Position (1):
Cold engine start with ambient temperature
below 5 °C (40 °F).
Position (2):
Cold engine start with ambient temperature
between 0 °C (30 °F) and 30 °C (90 °F).
Position (3):
Cold engine start with ambient temperature
above 25 °C (80 °F).
Ambient temp./starter (choke) position6. Completely close the throttle lever and start
the engine by pushing the start switch.
NOTE:If the engine fails to start, release the start switch,
then push it again. Pause a few seconds before
the next attempt. Each cranking should be as short
as possible to preserve battery energy. Do not
crank the engine more than 10 seconds on eachattempt.
7. If the engine is started with the starter (choke)
in position (1), the starter (choke) should be
returned to position (2) to warm up the engine.
If the engine is started with the starter (choke)
in position (2), keep the starter (choke) in this
position to warm up the engine.CAUTION:ECB00160For maximum engine life, always warm the en-
gine up before starting off. Never acceleratehard when the engine is cold!
8. Continue warming up the engine until it idles
smoothly, then return the starter (choke) to
position (3) before riding.
1. Fully open
2. Half open
3. Closed
4. Starter (choke)U5YT64E0.book Page 2 Monday, April 9, 2007 1:03 PM
Page 48 of 134
6-3
6
NOTE:The engine is warm when it responds normally tothe throttle with the starter (choke) turned off.EBU20291Starting a warm engine Follow the same procedure as for starting a cold
engine, with the exception that the starter (choke)
is not required when the engine is warm. Instead,
start the engine with the throttle slightly open.EBU20340Operating the drive select lever and
driving in reverse CAUTION:ECB00170Before shifting, stop the ATV, otherwise thetransmission may be damaged.
Shifting: Reverse to Forward
1. Bring the ATV to a complete stop.
2. Pull in the clutch lever to disengage the clutch.
3. Apply the brake pedal.
4. While pulling the drive select lever handle up-
ward, move the drive select lever forward until
it completely stops.5. Release the brake pedal.
6. Open the throttle lever gradually and release
the clutch lever slowly.
Shifting: Forward to Reverse
1. Bring the ATV to a complete stop.
2. Pull in the clutch lever to disengage the clutch.
3. Apply the brake pedal.
4. While pulling the drive select lever handle up-
ward, move the drive select lever to the rear
until it completely stops.
1. Drive select lever
2. Drive select lever handle
3. For forward drive
4. For reverse drive
U5YT64E0.book Page 3 Monday, April 9, 2007 1:03 PM
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