2011 YAMAHA WR 250R tire size

INSTRUMENT AND CONTROL FUNCTIONS
3-7
1
23
4
5
6
7
8
9when the vehicle is stopped. To stop
and/or resume counting, repeat steps 2
and 3.
Auto start1. Push the “SELECT 1” button for at
least two seconds to set the auto
start.TIPWhen the stopwatch is set to auto start,
the stopwatch indicator “ ” and the
distance-compensation tripmeter indi-
cator “ ” will start flashing, and the dig-
its in the display will start scrolling fromleft to right.
2. When the vehicle starts moving,
the stopwatch will start counting.
3. Push the “SELECT 1” button and“SELECT 2” button together to
stop the stopwatch.
4. To resume counting, push the “SE-
LECT 1” button and “SELECT 2”
button together again.
TIPThe stopwatch will continue counting
when the vehicle is stopped. To stop
and/or resume counting, repeat steps 3and 4.
Measurement mode (for calibrating
the distance-compensation tripme-
ter’s reading)
The distance-compensation tripmeter
is a feature intended to provide a more
accurate tripmeter reading for enduro
riding. Calibrating this meter in accor-
dance with the distances specified on
the enduro course map will help famil-
iarize the rider with the course. In addi-
tion, calibrating the meter may also be
necessary when using tire, wheel,
chain sprocket sizes, etc. other than
specified. For further information con-
cerning the use of this meter, please
consult your nearby Yamaha dealer.
Calibrate the distance-compensationtripmeter as follows.
To increase the reading, push the “SE-
LECT 1” button. To decrease the read-
ing, push the “SELECT 2” button.
Pushing and holding either button will
increase or decrease the reading con-
tinuously until the button is released.
TIPCalibrating the reading of the dis-
tance-compensation tripmeter is possi-
ble regardless of the stopwatchoperation.
Resetting the distance-compensa-
tion tripmeter or the distance-com-
pensation tripmeter in combination
with the stopwatchTIPResetting can be made only to the dis-
tance-compensation tripmeter or to the
distance-compensation tripmeter incombination with the stopwatch.
Resetting the distance-compensationtripmeter1. Check that the stopwatch mea-
surement is in operation.
32D-9-E6.book 7 ページ ２０１１年１月７日　金曜日　午後３時１０分

PERIODIC MAINTENANCE AND ADJUSTMENT
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3
4
567
8
9 Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re-
place the tire immediately.
TIPThe tire tread depth limits may differ
from country to country. Always complywith the local regulations.Tire information
This motorcycle is equipped with tube
tires.
WARNING
EWA10461
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, whichcould lead to an accident.
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
WARNING
EWA10571

Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the mo-torcycle with excessively worn
tires decreases riding stability
and can lead to loss of control.

The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.

It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a
high-quality product.

Ride at moderate speeds after
changing a tire since the tire
surface must first be “broken
in” for it to develop its optimalcharacteristics.
1. Tire sidewall
2. Tire tread depthMinimum tire tread depth (front and
rear):
1.6 mm (0.06 in)
Front tire:
Size:
80/100-21M/C 51P
Manufacturer/model:
BRIDGESTONE/TW-301 F
Rear tire:
Size:
120/80-18M/C 62P
Manufacturer/model:
BRIDGESTONE/TW-302 F
32D-9-E6.book 21 ページ ２０１１年１月７日　金曜日　午後３時１０分

SPECIFICATIONS
8-2
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78
9
Gear ratio:1st:
2.642 (37/14)
2nd:
1.813 (29/16)
3rd:
1.318 (29/22)
4th:
1.040 (26/25)
5th:
0.889 (24/27)
6th:
0.786 (22/28)Chassis:Frame type:
Semi double cradle
Caster angle:
26.67 
Trail:
111 mm (4.4 in)Front tire:Type:
With tube
Size:
80/100-21M/C 51P
Manufacturer/model:
BRIDGESTONE/TW-301 FRear tire:Type:
With tube
Size:
120/80-18M/C 62P
Manufacturer/model:
BRIDGESTONE/TW-302 F
Loading:Maximum load:
185 kg (408 lb)
* (Total weight of rider, passenger, cargo
and accessories)Tire air pressure (measured on cold
tires):Loading condition:
0–90 kg (0–198 lb)
Front:
125 kPa (1.25 kgf/cm
2, 18 psi)
Rear:
175 kPa (1.75 kgf/cm2, 25 psi)
Loading condition:
90–185 kg (198–408 lb)
Front:
150 kPa (1.50 kgf/cm2, 22 psi)
Rear:
200 kPa (2.00 kgf/cm2, 29 psi)
Front wheel:Wheel type:
Spoke wheel
Rim size:
21x1.60Rear wheel:Wheel type:
Spoke wheel
Rim size:
18x2.15Front brake:Type:
Single disc brake
Operation:
Right hand operationRecommended fluid:
DOT 4
Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
270.0 mm (10.63 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
270.0 mm (10.63 in)Electrical system:Ignition system:
TCI
Charging system:
AC magnetoBattery:Model:
YTZ7S
Voltage, capacity:
12 V, 6.0 Ah
32D-9-E6.book 2 ページ ２０１１年１月７日　金曜日　午後３時１０分