tire pressure YAMAHA YFM250R 2011 Owners Manual

1-5
1
**.* kPa
*.** kgf/cm²
*.* psi**.* kPa
*.** kgf/cm²
*.* psi
NEVER use with drugs or alcohol.
NEVER store fuel or flammable liquids.
This unit contains high-pressure nitrogen
gas.
Mishandling can cause an explosion. Do not
incinerate, puncture or open.
Use unleaded gasoline only.
Measure the tire pressure when the tires are
cold.Adjust the tire pressure.
Improper tire pressure can cause loss of
control.
Loss of control can result in severe injury or
death.
Turning the ATV in 4WD-LOCK
(“DIFF.LOCK”) takes more effort.
Operate at a slow speed and allow extra
time and distance for maneuvers to avoid
loss of control.
This pictogram shows the loading limits
and/or maximum load capacity for this ATV.
Follow all load limits and other loading
guidelines in this manual.
Load may include the driver, passenger,
human protective gear, accessories, goods,
luggage, and all other load related items.
Make sure you do not exceed the load limits.
Overloading can cause loss of control.
Loss of control can result in severe injury or
death.
U1BT61E0.book Page 5 Tuesday, April 6, 2010 1:28 PM

1-9
1
WARNING
OPERATING TIRE PRESSURE : Set with tires cold
Recommended
: Front
: 27.5
kPa,
Rear
: 27.5
kPa,

Minimum
: Front
: 24.5
kPa,
Rear
: 24.5
kPa,

Never set tire pressure below minimum.
It could cause the tire to dislodge from the rim.LOADINGMaximum weight capacity:
100 kg,(220 lbs).
Includes weight of operator, cargo and accessories.Improper tire pressure or overloading can cause
loss of control.
Loss of control can result in severe injury or
death.
4.0 psi
4.0 psi
3.6 psi
3.6 psi(
()
()
())
4D3-2816M-00
4AA-22259-40
4AA-22259-40
4 5 YFM250RSEA
6
U1BT61E0.book Page 9 Tuesday, April 6, 2010 1:28 PM

2-3
2speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.

Always check for obstacles before operating in a
new area.
Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.
Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.
Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.

Always use the size and type of tires specified in
this manual.
Always maintain proper tire pressure as de-
scribed in this manual.
Never modify an ATV through improper installa-
tion or use of accessories.
Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00071Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon monoxide,
a deadly gas. Breathing carbon monoxide can
cause headaches, dizziness, drowsiness, nau-
sea, confusion, and eventually death.
Carbon Monoxide is a colorless, odorless,
tasteless gas which may be present even if you
do not see or smell any engine exhaust. Deadly
levels of carbon monoxide can collect rapidly
and you can quickly be overcome and unable
to save yourself. Also, deadly levels of carbon
monoxide can linger for hours or days in en-
U1BT61E0.book Page 3 Tuesday, April 6, 2010 1:28 PM

5-2
5
Rear brakeCheck operation. If soft or spongy, have Yamaha dealer bleed hy-
draulic system.
Check brake pads for wear, and replace if necessary.
Check brake fluid level in reservoir, and add recommended brake
fluid to specified level if necessary.
Check hydraulic system for leakage. Correct if necessary.5-3, 8-22, 8-23, 8-25
ClutchCheck operation, and correct if necessary.
Lubricate cable if necessary.
Check lever free play, and adjust if necessary.8-28
Throttle leverMake sure that operation is smooth. Lubricate cable and lever hous-
ing if necessary.
Check cable free play, and adjust if necessary.5-3, 8-21
Control cablesMake sure that operation is smooth. Lubricate if necessary. 8-31
Drive chainCheck chain slack, and adjust if necessary.
Check chain condition. Lubricate if necessary.5-4, 8-29, 8-31
Wheels and tiresCheck wheel condition, and replace if damaged.
Check tire condition and tread depth. Replace if necessary.
Check air pressure. Correct if necessary.5-4
Shift pedalMake sure that operation is smooth.
Correct if necessary.8-33
Brake pedal Make sure that operation is smooth. Lubricate pedal pivoting point if
necessary.8-33
Brake and clutch leversMake sure that operation is smooth. Lubricate lever pivoting points if
necessary.8-32
Chassis fastenersMake sure that all nuts, bolts and screws are properly tightened. 5-6
Instruments, lights and
switchesCheck operation, and correct if necessary. 5-6 ITEM ROUTINE PAGE
U1BT61E0.book Page 2 Tuesday, April 6, 2010 1:28 PM

5-4
5
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.)EBU19794Tires Check tire pressure regularly to make sure it is at
the recommended specifications. Also check for
wear and damage.
Tire pressure
Use the low-pressure tire gauge to check and ad-
just tire pressures when the tires are cold. Tire
pressures must be equal on both sides.
WARNING! Operation of this vehicle with im-
proper tire pressure may cause severe injury
or death from loss of control or rollover. Tire
pressure below the minimum specified could
also cause the tire to dislodge from the rim un-
der severe riding conditions.
[EWB02541]
Set tire
pressures to the following specifications: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 be
incorrect.Recommended tire pressure:
Fron t
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Rear
27.5 kPa (0.275 kgf/cm², 4.0 psi)
Minimum tire pressure:
Fron t
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Rear
24.5 kPa (0.245 kgf/cm², 3.6 psi)
Maximum tire seating pressure:
Fron t
250 kPa (2.5 kgf/cm², 36 psi)
Rear
250 kPa (2.5 kgf/cm², 36 psi)
U1BT61E0.book Page 4 Tuesday, April 6, 2010 1:28 PM

5-5
5
Tire wear limit
When the tire groove decreases to 3 mm (0.12 in)
due to wear, replace the tire.Tire information
This ATV is equipped with tubeless tires with
valves.
WARNING
EWB02551Use of improper tires on this ATV may cause
loss of control, increasing your risk of an acci-
dent.After extensive tests, only the tires listed below
have been approved for this model by Yamaha
Motor Co., Ltd.
1. Low-pressure tire gauge
1. Tire wear limit
U1BT61E0.book Page 5 Tuesday, April 6, 2010 1:28 PM

8-2
8
EBU29790Owner’s manual and tool kit Be sure to put this owner’s manual in the cover and
always carry it along with the low-pressure tire
gauge and the owner’s tool kit under the seat.
The service information included in this manual
and the tools provided in the owner’s tool kit are in-
tended to assist you in the performance of preven-
tive maintenance and minor repairs. However,
additional tools such as a torque wrench may be
necessary to perform certain maintenance work
correctly.
TIPIf you do not have the tools or experience required
for a particular job, have a Yamaha dealer perform
it for you.
1. Low-pressure tire gauge
2. Owner’s tool kit
3. Owner’s manual
4. Manual cover123
4
43
U1BT61E0.book Page 2 Tuesday, April 6, 2010 1:28 PM

8-6
8
5*Brake hosesCheck for cracks or other damage, and replace if
necessary.√√√√
Replace. Every 4 years
6*Parking bra keCheck operation and adjust if necessary.√√√√√
7*WheelsCheck runout and for damage, and replace if nec-
essary.√ √√√
8*TiresCheck tread depth and for damage, and replace if
necessary.
Check air pressure and balance, and correct if
necessary.√ √√√
9*Wheel hub bearingsCheck for looseness or damage, and replace if
necessary.√ √√√
10*Swingarm pivotsCheck operation and for excessive play, and re-
place bearings if necessary.
Lubricate with lithium-soap-based grease.√√√
11*Upper and lower
arm pivotsLubricate with lithium-soap-based grease.√√√
12 Drive chainCheck chain slack and adjust if necessary.
Check rear wheel alignment and correct if neces-
sary.
Clean and lubricate.√√√√√
13*Drive chain rollerCheck for wear and replace if necessary.√√√ NO. ITEMCHECK OR MAINTENANCE
JOBINITIAL EVERY
Whichev-
er comes
firstmonth136612
km
(mi)320
(200)1300
(800)2500
(1600)2500
(1600)5000
(3200)
hours 20 80 160 160 320U1BT61E0.book Page 6 Tuesday, April 6, 2010 1:28 PM

9-2
9
EBU25933Storage Short-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00721]
Long-term
Before storing your ATV for several months:
1. Follow all the instructions in the “Cleaning”
section of this chapter.
2. Turn the fuel cock lever to “OFF”.
3. Drain the carburetor float chamber by loosen-
ing the drain bolt; this will prevent fuel deposits
from building up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if
available) to prevent the fuel from deteriorat-
ing.5. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.
a. Remove the spark plug cap and spark
plug.
b. Pour a teaspoonful of engine oil into the
spark plug bore.
c. Install the spark plug cap onto the spark
plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the
starter. (This will coat the cylinder wall with
oil.)
e. Remove the spark plug cap from the spark
plug, and then install the spark plug and
the spark plug cap.
6. Lubricate all control cables and the pivoting
points of all levers and pedals.
7. Check and, if necessary, correct the tire air
pressure, and then block up the ATV so that
all of its wheels are off the ground. Alternative- Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U1BT61E0.book Page 2 Tuesday, April 6, 2010 1:28 PM

10-3
10
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)Front tire:Type:
Tubeless
Size:
AT20 x 7-10
Manufacturer/model:
DUNLOP/KT201
Rear tire:Type:
Tubeless
Size:
AT19 x 10-9
Manufacturer/model:
DUNLOP/KT205ALoading: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
U1BT61E0.book Page 3 Tuesday, April 6, 2010 1:28 PM