Page 48 of 140

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 8-21.)
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.)EBU28081Tires
WARNING
EWB02391Use 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 MBK INDUSTRIE for this model. Other tire
combinations are not recommended.
Front:
Manufacturer/model:
MAXXIS/C9207
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Page 49 of 140

5-5
5 Size:
AT21 x 7-10
Type:
Tubeless
Rear:
Manufacturer/model:
MAXXIS/M976
Size:
AT20 x 10-9
Type:
Tubeless
The tires should be set to the recommended
pressure:
Recommended tire pressure:
Front:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Rear:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
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:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Rear:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Use no more than the following pressures
when seating the tire beads.
Maximum tire seating pressure:
Front:
250 kPa (2.5 kgf/cm², 36 psi)
Rear:
250 kPa (2.5 kgf/cm², 36 psi)
Higher pressures and fast inflation may
cause a tire to burst. Inflate the tires very
slowly and carefully.EBU19821Measuring the tire pressure Use the low-pressure tire gauge.TIPThe 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.
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Page 51 of 140

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.EBU20181Starting 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.
NOTICEECB00150See the “Engine break-in” section on page 6-5prior 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.TIPThis 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 transmission
in gear. However, it is recommended to shift intoneutral before starting the engine.
5. Use the starter (choke) in reference to the fig-
ure:
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Page 131 of 140

10-2
10
Engine oil quantity:
Without oil filter element replacement:
1.25 L (1.32 US qt, 1.10 Imp.qt)
With oil filter element replacement:
1.35 L (1.43 US qt, 1.19 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
9.0 L (2.38 US gal, 1.98 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)Carburetor:Manufacturer:
MIKUNI
Type × quantity:
BSR29 x 1Spark plug (s):Manufacturer/model:
NGK/DR7EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, multiple-disc
Operation:
Left hand operation
Transmission:Primary reduction system:
Spur gear
Primary reduction ratio:
76/22 (3.455)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
38/14 (2.714)
Transmission type:
Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio:
1st:
37/13 (2.846)
2nd:
33/18 (1.833)
3rd:
29/21 (1.381)
4th:
27/24 (1.125)
5th:
28/29 (0.966)Chassis:Frame type:
Steel tube frame
Caster angle:
6.0 °
Trail:
23.0 mm (0.91 in)
U33B70E0.book Page 2 Wednesday, June 11, 2008 1:38 PM
Page 132 of 140
10-3
10
Front tire:Type:
Tubeless
Size:
AT21 x 7-10
Manufacturer/model:
MAXXIS/C9207Rear tire:Type:
Tubeless
Size:
AT20 x 10-9
Manufacturer/model:
MAXXIS/M976Loading:Maximum loading limit:
100.0 kg (220 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:
Front:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Rear:
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Minimum:
Front:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Rear:
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Front wheel:Wheel type:
Panel wheel
Rim size:
10 x 5.5ATRear wheel:Wheel type:
Panel wheel
Rim size:
9 x 8.5ATFront brake:Type:
Dual disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Double wishbone
Spring/shock absorber type:
YFM250RSE-W Coil spring/gas-oil damper
YFM250R-W Coil spring/oil damper
U33B70E0.book Page 3 Wednesday, June 11, 2008 1:38 PM
Page 134 of 140
11-1
11
EBU26000
CONSUMER INFORMATION
EBU26011Identification numbers Record the key identification number, vehicle iden-
tification number and model label information in
the spaces provided below for assistance when or-
dering spare parts from a Yamaha dealer or for ref-
erence in case the ATV is stolen.
KEY IDENTIFICATION NUMBER:
VEHICLE IDENTIFICATION NUMBER:
MODEL LABEL INFORMATION:
EBU26020Key identification number
The key identification number is stamped into the
key. Record this number in the space provided and
use it for reference when ordering a new key.EBU26030Vehicle identification number
The vehicle identification number is stamped into
the frame.1. Key identification number
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Page 135 of 140
11-2
11
TIPThe vehicle identification number is used to identifyyour ATV.EBU26050Model label
The model label is affixed at the location in the il-
lustration. Record the information on this label in
the space provided. This information will be need-
ed when ordering spare parts from a Yamaha deal-
er.1. Vehicle identification number
1
1. Model label
1
U33B70E0.book Page 2 Wednesday, June 11, 2008 1:38 PM