2002 YAMAHA WR 250F Owners Manual

SPEC
2 - 14
MAINTENANCE SPECIFICATIONS
NOTE:
1. First, tighten the steering nut approximately 38 Nm (3.8 m • kg, 27 ft • lb) by using the steering
nut wrench, then loosen the steering nut one turn.
2. Retighten the steering nut 7 Nm (0.7 m • kg, 5.1 ft • lb). Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Upper bracket and outer tube M8 × 1.25 4 23 2.3 17
Lower bracket and outer tube M8 × 1.25 4 20 2.0 14
Upper bracket and steering stem M24 × 1.0 1 145 14.5 105
Handlebar holder and upper bracket M8 × 1.25 4 28 2.8 20
Steering stem and steering ring nut M28 × 1.0 1 Refer to NOTE.
Front fork and front fork cap bolt M48 × 1.0 2 30 3.0 22
Front fork and base valve M30 × 1.0 2 55 5.5 40
Front fork cap bolt and damper rod M12 × 1.25 2 29 2.9 21
Front fork bleed screw and front fork cap bolt M5 × 0.8 2 1 0.1 0.7
Front fork and front fork protector M6 × 1.0 6 10 1.0 7.2
Meter cable holder and front fork protector M5 × 0.8 2 4 0.4 2.9
Front fork and brake hose guide M5 × 0.8 2 4 0.4 2.9
Front fork and brake hose holder M6 × 1.0 2 10 1.0 7.2
Front fork and brake hose cover (M8) M8 × 1.25 1 16 1.6 11
(M6) M6 × 1.0 1 7 0.7 5.1
Throttle grip cap M5 × 0.8 2 4 0.4 2.9
Front brake master cylinder M6 × 1.0 2 9 0.9 6.5
Brake lever mounting bolt M6 × 1.0 1 6 0.6 4.3
Brake lever mounting nut M6 × 1.0 1 6 0.6 4.3
Brake lever position locknut M6 × 1.0 1 5 0.5 3.6
Front brake hose guide M5 × 0.8 2 4 0.4 2.9
Clutch lever holder M5 × 0.8 2 4 0.4 2.9
Clutch lever mounting bolt M6 × 1.0 1 2 0.2 1.4
Decompression lever holder M5 × 0.8 2 4 0.4 2.9
Light switch M4 × 0.7 2 2 0.2 1.4
Front brake master cylinder cap M4 × 0.7 2 2 0.2 1.4
Front brake hose union bolt M10 × 1.25 2 30 3.0 22
Front brake caliper M8 × 1.25 2 23 2.3 17
Pad pin plug M10 × 1.0 2 3 0.3 2.2
Front brake caliper and pad pin M10 × 1.0 1 18 1.8 13
Rear brake caliper and pad pin M10 × 1.0 1 18 1.8 13
Brake caliper and bleed screw M8 × 1.25 2 6 0.6 4.3
Front wheel axle and axle nut M16 × 1.5 1 105 10.5 75
Front wheel axle holder M8 × 1.25 4 23 2.3 17
Front brake disc M6 × 1.0 6 12 1.2 8.7

SPEC
2 - 15
MAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Rear brake disc M6 × 1.0 6 14 1.4 10
Brake pedal M8 × 1.25 1 26 2.6 19
Rear brake master cylinder M6 × 1.0 2 10 1.0 7.2
Rear brake reservoir tank M6 × 1.0 1 10 1.0 7.2
Rear brake reservoir tank cap M4 × 0.7 2 2 0.2 1.4
Rear brake hose union bolt M10 × 1.25 2 30 3.0 2.2
Rear wheel axle and axle nut M20 × 1.5 1 125 12.5 90
Nipple (spoke)—72 3 0.3 2.2
Rear wheel sprocket M8 × 1.25 6 42 4.2 30
Rear brake disc cover M6 × 1.0 2 7 0.7 5.1
Rear brake caliper protector M6 × 1.0 2 7 0.7 5.1
Engine mounting:
Engine and engine bracket (front) M10 × 1.25 1 69 6.9 50
Engine and frame (lower) M10 × 1.25 1 69 6.9 50
Engine bracket and frame M8 × 1.25 6 34 3.4 24
Engine and engine bracket (upper) M10 × 1.25 1 55 5.5 40
Lower engine guard M6 × 1.0 3 10 1.0 7.2
Left engine guard M8 × 1.25 2 23 2.3 17
Right engine guard M8 × 1.25 2 10 1.0 7.2
Pivot shaft and nut M16 × 1.5 1 85 8.5 61
Relay arm and swingarm M14 × 1.5 1 80 8.0 58
Relay arm and connecting rod M14 × 1.5 1 80 8.0 58
Connecting rod and frame M14 × 1.5 1 80 8.0 58
Rear shock absorber and frame M10 × 1.25 1 56 5.6 40
Rear shock absorber and relay arm M10 × 1.25 1 53 5.3 38
Rear frame M8 × 1.25 3 29 2.9 21
Swingarm and brake hose holder M5 × 0.8 4 1 0.1 0.7
Swingarm and patch M4 × 0.7 4 2 0.2 1.4
Upper drive chain tensioner M8 × 1.25 1 19 1.9 13
Lower drive chain tensioner M8 × 1.25 1 20 2.0 14
Drive chain case M6 × 1.0 3 7 0.7 5.1
Seal guard and swingarm M5 × 0.8 4 6 0.6 4.3
Fuel tank M6 × 1.0 2 10 1.0 7.2
Fuel cock M6 × 1.0 2 7 0.7 5.1
Seat set bracket and fuel tank M6 × 1.0 1 7 0.7 5.1
Hooking screw (fitting band) and fuel tank M6 × 1.0 1 7 0.7 5.1
Radiator cover M6 × 1.0 6 4 0.4 2.9
Front fender M6 × 1.0 4 7 0.7 5.1
Rear fender and air filter case M6 × 1.0 2 7 0.7 5.1
Rear fender and frame (right) M6 × 1.0 1 10 1.0 7.2
Side cover M6 × 1.0 2 7 0.7 5.1
Seat M8 × 1.25 2 23 2.3 17

SPEC
2 - 16
MAINTENANCE SPECIFICATIONS
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race. Headlight stay (lower) and lower bracket M8 × 1.25 2 7 0.7 5.1
Headlight (left and right) M6 × 1.0 2 10 1.0 7.2
Headlight (lower) M6 × 1.0 1 7 0.7 5.1
Taillight M6 × 1.0 3 4 0.4 2.9
Taillight lead clamp and rear fender M4 × 1.59 2 1 0.1 0.7
Coolant reservoir (front) M6 × 1.0 1 7 0.7 5.1
Coolant reservoir (rear) M6 × 1.0 1 11 1.1 8.0
Sidestand bracket and frame M10 × 1.25 2 66 6.6 48
Sidestand M10 × 1.25 1 64 6.4 46 Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb

SPEC
2 - 17
MAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Item Standard Limit
Ignition system:
Advancer type Electrical ----
CDI:
Magneto-model (stator)/manufac-
turer5NG-50/YAMAHA----
Charging coil 1 resistance (color) 640 ~ 960 Ω at 20 ˚C (68 ˚F)
(Green – Brown)----
Charging coil 2 resistance (color) 464 ~ 696 Ω at 20 ˚C (68 ˚F)
(Green – Pink)----
Lighting coil resistance (color) 0.16 ~ 0.24 Ω at 20 ˚C (68 ˚F)
(Black – Yellow)----
Pickup coil resistance (color) 248 ~ 372 Ω at 20 ˚C (68 ˚F)
(White – Red)----
CDI unit-model/manufacturer 5PH-50/YAMAHA
(For USA)
5PH-60/YAMAHA
(For EUROPE)
5PH-80/YAMAHA
(For CDN, AUS, NZ and ZA)----
----
----
Ignition coil:
Model/manufacturer 4SR-00/YAMAHA ----
Minimum spark gap 6 mm (0.24 in) ----
Primary coil resistance 0.20 ~ 0.30 Ω at 20 ˚C (68 ˚F) ----
Secondary coil resistance 9.5 ~ 14.3 kΩ at 20 ˚C (68 ˚F) ----
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Stator M6 × 1.0 3 10 1.0 7.2
Rotor M10 × 1.25 1 48 4.8 35
Neutral switch M5 × 0.8 2 4 0.4 2.9
Ignition coil M6 × 1.0 2 7 0.7 5.1

SPEC
2 - 18
EC220001
GENERAL TORQUE SPECIFICATIONS
This chart specifies torque for standard fasten-
ers with standard I.S.O. pitch threads. Torque
specifications for special components or
assemblies are included in the applicable sec-
tions of this book. To avoid warpage, tighten
multi-fastener assemblies in a crisscross fash-
ion, in progressive stages, until full torque is
reached. Unless otherwise specified, torque
specifications call for clean, dry threads. Com-
ponents should be at room temperature.
A: Distance between flats
B: Outside thread diameter
EC230000
DEFINITION OF UNITS
A
(Nut)B
(Bolt)TORQUE
SPECIFICATION
Nm m•kg ft•lb
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm6 mm
8 mm
10 mm
12 mm
14 mm
16 mm6
15
30
55
85
1300.6
1.5
3.0
5.5
8.5
134.3
11
22
40
61
94
Unit Read Definition Measure
mm
cmmillimeter
centimeter10
-3 meter
10-2 meterLength
Length
kg kilogram 10
3 gram Weight
N Newton 1 kg × m/sec
2 Force
Nm
m • kgNewton meter
Meter kilogramN × m
m × kgTorque
Torque
Pa Pascal N/m
2Pressure
N/mm Newton per millimeter N/mm Spring rate
L
cm
3 Liter
Cubic centimeter—
—Volume or capacity
Volume or capacity
r/min Revolution per minute—Engine speed
GENERAL TORQUE SPECIFICATIONS/
DEFINITION OF UNITS

2 - 1
SPEC

CARACTERISTIQUES
CARACTERISTIQUES GENERALES
Nom de modèle: WR250FP (USA)
WR250F (EUROPE)
WR250F(P) (CDN, AUS, NZ, ZA)
Numéro de code de modèle: 5PH5 (USA)
5PH6 (EUROPE)
5PH8 (CDN, AUS, NZ, ZA)
Dimensions:
Longueur hors tout 2.165 mm (85,2 in)
Largeur hors tout 827 mm (32,6 in)
Hauteur hors tout 1.303 mm (51,3 in)
Hauteur de la selle 998 mm (39,3 in)
Empattement 1.475 mm (58,1 in)
Garde au sol minimale 382 mm (15,0 in)
Poids en ordre de marche:
Avec pleins d’huile et de carburant 110,0 kg (242,5 lb)
Moteur:
Type 4 temps, refroidissement liquide, double arbre à
cames en tête (DOHC)
Dispositions du cylindre Monocylindre, incliné vers l’avant
Cylindrée 249 cm
3

(8,76 Imp oz, 8,42 US oz)
Alésage
×
course 77,0
×
53,6 mm (3,03
×
2,11 in)
Taux de compression 12,5 : 1
Système de démarrage Kick
Système de graissage: Carter sec
Type ou grade d’huile:
Huile moteur (Pour les USA et le CDN)
Min. 5 ˚C (40 ˚F)
Å
:
Yamalube 4 (20W-40) ou SAE 20W-40 de type SH
(sans additifs anti-friction)
Max. 15 ˚C (60 ˚F)
ı
:
Yamalube 4 (10W-30) ou SAE 10W-30 de type SH
(sans additifs anti-friction)
et/ou
Yamalube 4-R (15W-50)
(sans additifs anti-friction)
(Excepté pour les USA et le CDN)
Qualité API “SH” ou supérieure
-20
-4-10
140
3010
5020
6830
8640 50
104
122°CTemp.
°F
10W-30
10W-40
20W-40
20W-50
15W-40

CARACTERISTIQUES GENERALES

2 - 2
SPEC

Quantité d’huile:
Huile moteur
Vidange périodique 1,5 L (1,32 Imp qt, 1,59 US qt)
Avec remplacement du filtre à huile 1,6 L (1,41 Imp qt, 1,69 US qt)
Quantité totale 1,7 L (1,50 Imp qt, 1,80 US qt)
Quantité de liquide de refroidissement (toutes les
tuyauteries comprises):1,3 L (1,14 Imp qt, 1,37 US qt)
Filtre à air: Elément de type humide
Essence:
Type Essence super sans plomb d’un indice d’octane de
recherche de 95 ou plus. (Excepté pour ZA)
Essence super (Pour ZA)
Capacité du réservoir
Réserve12 L (2,64 Imp gal, 3,17 US gal)
(Pour USA et CDN)
8,0 L (1,76 Imp gal, 2,11 US gal)
(Excepté pour USA et CDN)
1,6 L (0,35 Imp gal, 0,42 US gal)
(Pour USA et CDN)
1,4 L (0,31 Imp gal, 0,37 US gal)
(Excepté pour USA et CDN)
Carburateur:
Type FCR-MX37
Fabricant KEIHIN
Bougie:
Type/fabricant CR8E/NGK
U24ESR-N/DENSO
Ecartement des électrodes 0,7 à 0,8 mm (0,028 à 0,031 in)
Type d’embrayage: Humide, multi-disques
Transmission:
Système de réduction primaire Engrenage
Taux de réduction primaire 57/17 (3,353)
Système de réduction secondaire Entraînement par chaîne
Taux de réduction secondaire 52/13 (4,000)
Type de boîte de vitesse Prise constante, 5 rapports
Commande Au pied gauche
Taux de réduction: 1ère 31/13 (2,385)
2ème 28/16 (1,750)
3ème 28/21 (1,333)
4ème 25/24 (1,042)
5ème 22/27 (0,815)
Partie cycle:
Type de cadre Simple berceau dédoublé
Angle de chasse 27,1˚
Chasse 117,4 mm (4,62 in)
CARACTERISTIQUES GENERALES

2 - 3
SPEC

Pneu:
Type de pneu Avec chambre à air
Taille de pneu (avant) 80/100-21 51M (USA, CDN et ZA)
90/90-21 54R (EUROPE, AUS et NZ)
Taille de pneu (arrière) 100/100-18 59M (USA, CDN et ZA)
130/90-18 69R (EUROPE, AUS et NZ)
Pression de pneu (avant et arrière) 100 kPa (1,0 kgf/cm
2

, 15 psi)
Freins:
Type de frein avant Monodisque
Commande Main droite
Type de frein arrière Monodisque
Commande Pied droit
Suspension:
Suspension avant Fourche télescopique
Suspension arrière Bras oscillant (monocross de type biellette)
Amortisseurs:
Amortisseur avant Ressort hélicoïdal/amortisseur hydraulique
Amortisseur arrière Ressort hélicoïdal/amortisseur hydro-pneumatique
Débattement:
Roue avant 300 mm (11,8 in)
Roue arrière 315 mm (12,4 in)
Partie électrique:
Système d’allumage Magnéto CDI
Type de phare: Ampoule de quartz (halogène)
Puissance de l’ampoule
×
quantité:
Phare 12 V 60/55 W
×
1
Feu arrière 12 V 21/5 W
×
1
CARACTERISTIQUES GENERALES