tire pressure YAMAHA WR 250F 2007 Owners Manual

GENERAL SPECIFICATIONS
2 - 2
SPEC
Oil capacity:
Engine oil
Periodic oil change 1.1 L (0.97 Imp qt, 1.16 US qt)
With oil filter replacement 1.2 L (1.06 Imp qt, 1.27 US qt)
Total amount 1.4 L (1.23 Imp qt, 1.48 US qt)
Coolant capacity (including all routes): 0.99 L (0.87 Imp qt, 1.05 US qt)
Air filter: Wet type element
Fuel:
Type Premium unleaded gasoline only with a
research octane number of 95 or higher.
Tank capacity 8.0 L (1.76 Imp gal, 2.11 US gal)
Reserve 1.1 L (0.24 Imp gal, 0.29 US gal)
Carburetor:
Type FCR-MX37
Manufacturer KEIHIN
Spark plug:
Type/manufacturer CR9E/NGK (resistance type)
Gap 0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Clutch type: Wet, multiple-disc
Transmission:
Primary reduction system Gear
Primary reduction ratio 57/17 (3.353)
Secondary reduction system Chain drive
Secondary reduction ratio 50/13 (3.846)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 31/13 (2.385)
2nd 28/16 (1.750)
3rd 23/17 (1.353)
4th 23/21 (1.095)
5th 17/19 (0.895)
Chassis: USA, ZA, CDN EUROPE, AUS, NZ
Frame type Semi double cradle←
Caster angle 27.0°26.6°
Trail 115 mm (4.53 in) 114 mm (4.49 in)
Tire:
Type With tube
Size (front) 80/100-21 51M (For USA, CDN and ZA)
90/90-21 54R (For EUROPE, AUS and NZ)
Size (rear) 100/100-18 59M (For USA, CDN and ZA)
130/90-18 69R (For EUROPE, AUS and NZ)
Tire pressure (front and rear) 100 kPa (1.0 kgf/cm
2, 15 psi)
1
2
3
4
5
6
7

3 - 3
INSP
ADJ
MAINTENANCE INTERVALS
FRONT FORKS
Inspect and adjust
Replace oilSuspension oil “S1”
Replace oil seal
FRONT FORK OIL SEAL AND DUST SEAL
Clean and lubeLithium base grease
PROTECTOR GUIDE
Replace
REAR SHOCK ABSORBER
Inspect and adjust
Lube(After
rain
ride)Molybdenum disulfide
grease
Retighten
DRIVE CHAIN GUIDE AND ROLLERS
Inspect
SWINGARMMolybdenum disulfide
grease
Inspect, lube and retighten
RELAY ARM, CONNECTING ROD Molybdenum disulfide
grease
Inspect, lube and retighten
SIDESTAND
LubricateLithium base grease
STEERING HEAD
Inspect free play and retighten
Clean and lubeLithium base grease
Replace bearing
TIRE, WHEELS
Inspect air pressure, wheel run-out, tire
wear and spoke looseness
Retighten sprocket bolt
Inspect bearings
Replace bearings
LubricateLithium base grease
THROTTLE, CONTROL CABLE Yamaha cable lube or SAE
10W-30 motor oil
Check routing and connection
Lubricate
HOT STARTER, CLUTCH LEVER
Inspect free play
BATTERY
Check terminal for looseness and
corrosionItemAfter
break-inEvery
race
Every third
(or
500 km)Every fifth
(or
1,000 km)As
requiredRemarks

3 - 16
INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice, make sure the machine is in good operating condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
CoolantCheck that coolant is filled up to the radiator cap.
Check the cooling system for leakage.P.3-35 ~ 41
FuelCheck that a fresh gasoline is filled in the fuel tank. Check the
fuel line for leakage.P.1-49
Engine oilCheck that the oil level is correct. Check the crankcase and
frame oil line for leakage.P.3-51 ~ 59
Gear shifter and clutchCheck that gears can be shifted correctly in order and that the
clutch operates smoothly.P.3-41 ~ 43
Throttle grip/HousingCheck that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.P.3-43 ~ 45
Brakes Check the play of front brake and effect of front and rear brake. P.3-77 ~ 89
Drive chainCheck drive chain slack and alignment. Check that the drive
chain is lubricated properly.P.3-91 ~ 95
WheelsCheck for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.P.3-111 ~ 113
SteeringCheck that the handlebar can be turned smoothly and have no
excessive play.P.3-113 ~ 117
Front forks and rear shock
absorberCheck that they operate smoothly and there is no oil leakage. P.3-97 ~ 109
Cables (wires)Check that the clutch and throttle cables move smoothly. Check
that they are not caught when the handlebars are turned or when
the front forks travel up and down.—
Exhaust pipeCheck that the exhaust pipe is tightly mounted and has no
cracks.P.3-27 ~ 31
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-89
Lubrication Check for smooth operation. Lubricate if necessary. P.3-119
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-59
Lead connectorsCheck that the AC magneto, CDI unit, and ignition coil are
connected tightly.P.1-9
SettingsIs the machine set suitably for the condition of the course and
weather or by taking into account the results of test runs before
riding? Are inspection and maintenance completely done?P.4-1 ~ 40

3 - 111
INSP
ADJ
EC36Q000TIRE PRESSURE CHECK
1. Measure:
Tire pressure
Out of specification
→ Adjust.
NOTE:Check the tire while it is cold.
Loose bead stoppers allow the tire
to slip off its position on the rim
when the tire pressure is low.
A tilted tire valve stem indicates
that the tire slips off its position on
the rim.
If the tire valve stem is found tilted,
the tire is considered to be slipping
off its position. Correct the tire
position.
Standard tire pressure:
100 kPa
(1.0 kgf/cm
2, 15 psi)
EC36S002SPOKES INSPECTION AND
TIGHTENING
1. Inspect:
Spokes
1
Bend/damage
→ Replace.
Loose spoke
→ Retighten.
2. Tighten:
Spokes
NOTE:Be sure to retighten these spokes
before and after break-in. After a
practice check spokes for looseness.
T R..3 Nm (0.3 m · kg, 2.2 ft · lb)
EC36T000WHEEL INSPECTION
1. Inspect:
Wheel runout
Elevate the wheel and turn it.
Abnormal runout
→ Replace.
CONTROLE DE LA PRESSION DES
PNEUS
1. Mesurer:
Pression des pneus
Hors spécifications → Ajuster.
N.B.:
Contrôler les pneus à froid.
Le pneu risque de se déjanter si le
gonflage est insuffisant.
Une tige de valve de pneu inclinée
indique que le pneu est mal assis.
Une tige de valve de pneu inclinée
indique que le pneu est mal assis. Cor-
riger la position du pneu.
Pression des pneus
standard:
100 kPa
(1,0 kgf/cm
2, 15 psi)
CONTROLE ET SERRAGE DES
RAYONS
1. Contrôler:
Rayons 1
Déformation/endommagement →
Remplacer.
Rayon desserré → Resserrer.
2. Serrer:
Rayons
N.B.:
Veiller à retendre ces rayons avant et
après le rodage. Après un entraînement,
contrôler le serrage des rayons.
T R..3 Nm (0,3 m · kg, 2,2 ft · lb)
CONTROLE DES ROUES
1. Contrôler:
Voile de roue
Surélever la roue et la faire tour-
ner.
Voile excessif → Remplacer.
CHASSIS
CHÂSSIS

4 - 23
TUNSETTING
EC72N000Drive and rear wheel sprockets
setting parts
* For AUS and NZ
Part name Size Part number
Drive sprocket
1 (STD) 13T
* 14T9383B-13218
9383B-14222
Rear wheel
sprocket
2
(STD)
* (STD)48T
* 48T
* 49T
50T
* 50T
* 51T
52T
* 52T5GS-25448-50
1C3-25448-00
1C3-25449-00
5TJ-25450-80
1C3-25450-00
1C3-25451-00
5TJ-25452-80
1C3-25452-00
EC721002Tire pressure
Tire pressure should be adjust to suit
the road surface condition of the cir-
cuit.
Under a rainy, muddy, sandy, or
slippery condition, the tire pressure
should be lower for a larger area of
contact with the road surface.
Under a stony or hard road condi-
tion, the tire pressure should be
higher to prevent a flat tire.
Standard tire pressure:
100 kPa
(1.0 kgf/cm
2, 15 psi)
Extent of adjustment:
60 ~ 80 kPa
(0.6 ~ 0.8 kgf/cm
2,
9.0 ~ 12 psi)
Extent of adjustment:
100 ~ 120 kPa
(1.0 ~ 1.2 kgf /cm
2,
15 ~ 18 psi)
Pièces de réglage du pignon
d’entraînement et de la couronne
arrière
* AUS et NZ
Nom de la pièce Taille Numéro de pièce
Pignon
d’entraînement 1 (STD) 13T
* 14T9383B-13218
9383B-14222
Couronne arrière
2

(STD)
*(STD)48T
* 48T
* 49T
50T
* 50T
* 51T
52T
* 52T5GS-25448-50
1C3-25448-00
1C3-25449-00
5TJ-25450-80
1C3-25450-00
1C3-25451-00
5TJ-25452-80
1C3-25452-00
Pression des pneus
Régler la pression des pneus en fonction
des conditions du terrain.
En cas de conduite sous la pluie, sur
terrain boueux, sablonneux ou glis-
sant, réduire la pression des pneus
pour une meilleure adhérence.
Sur route pavée ou sur surface dure,
augmenter la pression des pneus afin
d’éviter les crevaisons.
Pression des pneus
standard:
100 kPa
(1,0 kgf/cm
2, 15 psi)
Plage de réglage:
60 à 80 kPa
(0,6 à 0,8 kgf/cm
2,
9,0 à 12 psi)
Plage de réglage:
100 à 120 kPa
(1,0 à 1,2 kgf/cm
2,
15 à 18 psi)
REGLAGE