2003 YAMAHA WR 250F engine

5 - 5
CHASFRONT WHEEL AND REAR WHEEL
EC598100REAR WHEEL
Extent of removal:
1 Rear wheel removal
2 Wheel bearing removal
3 Brake disc removal
Extent of removal Order Part name Q’ty Remarks
REAR WHEEL REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
1 Nut (rear wheel axle) 1
2 Rear wheel axle 1
3 Drive chain puller 2
4 Rear wheel 1 Refer to “REMOVAL POINTS”.
5 Collar 2
6 Rear wheel sprocket 1
7 Oil seal 2
8 Circlip 1
9 Bearing 2 Refer to “REMOVAL POINTS”.
10 Brake disc 1
1
2
3
3

5 - 23
CHASFRONT BRAKE AND REAR BRAKE
EC5A0000
FRONT BRAKE AND REAR BRAKE
EC5A8000FRONT BRAKE
Extent of removal:
1 Brake hose removal
2 Brake caliper removal
3 Brake master cylinder removal
Extent of removal Order Part name Q’ty Remarks
FRONT BRAKE REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Brake hose cover 1
2 Brake hose holder 1
3 Bolt (brake hose holder) 2 Only loosening.
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the brake caliper.
8 Brake caliper 1
9 Brake lever 1
10 Brake master cylinder bracket 1
11 Brake master cylinder 1
1
2
2
3
3

5 - 27
CHASFRONT BRAKE AND REAR BRAKE
EC5A8100REAR BRAKE
Extent of removal:
1 Brake master cylinder removal
2 Brake hose removal
3 Brake caliper removal
Extent of removal Order Part name Q’ty Remarks
REAR BRAKE REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Rear wheel Refer to “FRONT WHEEL AND REAR WHEEL”
section.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Brake pedal 1
2 Brake master cylinder 1
3 Brake hose holder 2
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the brake caliper.
8 Brake caliper 1
1
13
3
2

5 - 61
CHASFRONT FORK
EC550000
FRONT FORK
Extent of removal:
1 Front fork removal
Extent of removal Order Part name Q’ty Remarks
FRONT FORK REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Front wheel Refer to “FRONT WHEEL AND REAR WHEEL”
section.
Front brake caliper Refer to “FRONT BRAKE AND REAR BRAKE”
section.
Headlight
Handlebar Refer to “HANDLEBAR” section.
1 Protector 1
2 Brake hose holder 2
3 Pinch bolt (upper bracket) 2 Only loosening.
4 Cap bolt 1 Loosen when disassembling the front fork.
5 Pinch bolt (lower bracket) 2 Only loosening.
6 Front fork 1
1

5 - 91
CHASHANDLEBAR
EC5B0000
HANDLEBAR
Extent of removal:
1 Handlebar removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
HANDLEBAR REMOVAL
Headlight
1 Hot starter cable 1 Disconnect at the lever side.
2 Hot starter lever holder 1
3 Clutch cable 1 Disconnect at the lever side.
4 Clutch lever holder 1 Disconnect the clutch switch lead.
5 Engine stop switch 1 Disconnect the engine stop switch lead.
6 Light switch 1
7 Brake master cylinder 1 Refer to “REMOVAL POINTS”.
8 Start switch 1 Disconnect the start switch lead.
9 Throttle cable cap 1
10 Throttle cable #2 (pushed) 1 Disconnect at the throttle side.
11 Throttle cable #1 (pulled) 1 Disconnect at the throttle side.
12 Right grip 1 Refer to “REMOVAL POINTS”.
13 Tube guide 1
14 Grip cap cover 1
15 Left grip 1 Refer to “REMOVAL POINTS”.
16 Handlebar upper holder 2
17 Handlebar 1
1

5 - 101
CHASHANDLEBAR
10. Install:
Engine stop switch
1
Clutch lever holder
2
Bolt (clutch lever holder)
3
Hot starter lever holder
4
Bolt
(hot starter lever holder)
5
Clamp
6
NOTE:The engine stop switch, clutch
lever holder and clamp should be
installed according to the dimen-
sions shown.
Pass the engine stop switch lead in
the middle of the clutch lever
holder.
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
11. Install:
Clutch cable
1
Hot starter cable
2
NOTE:Apply the lithium soap base grease
on the clutch cable end and hot
starter cable end.
12. Adjust:
Clutch lever free play
Refer to “CLUTCH ADJUST-
MENT” section in the CHAP-
TER 3.
Hot starter lever free play
Refer to “HOT STARTER
LEVER ADJUSTMENT” sec-
tion in the CHAPTER 3.
13. Fasten the hot starter cable
1
and clutch cable
2 with a clamp
3.
1
2
3
14. Insert the end of the fuel
breather hose
1 into the hole in
the steering stem cap
2.
1
2
10. Monter:
Coupe-circuit de moteur 1
Support de levier d’embrayage 2
Boulon (support de levier
d’embrayage) 3
Support du levier de démarreur à
chaud 4
Boulon (support du levier de
démarreur à chaud) 5
Bride 6
N.B.:
Le coupe-circuit de moteur, le support
de levier d’embrayage et l’attache en
plastique doivent être installés en res-
pectant les dimensions indiquées.
Faire passer le fil du coupe-circuit de
moteur au centre du support de levier
d’embrayage.
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
11. Monter:
Câble d’embrayage 1
Câble de démarreur à chaud 2
N.B.:
Enduire de la graisse à base de savon au
lithium sur l’extrémité du câble
d’embrayage, et sur l’extrémité du câble
de démarrage à chaud.
12. Régler:
Jeu du levier d’embrayage
Se reporter à la section “REGLA-
GE DE L’EMBRAYAGE” du
CHAPITRE 3.
Jeu du levier de démarreur à
chaud
Se reporter à la section
“REGLAGE DU LEVIER DE
DEMARREUR A CHAUD” du
CHAPITRE 3.
13. Attacher le câble de démarrage à
chaud 1 et le câble d’embrayage
2 à l’aide d’une bride 3.
14. Insérer l’extrémité de la durit de
mise à l’air du réservoir de carbu-
rant 1 dans le trou du capuchon 2
de la colonne de direction.
GUIDON

5 - 103
CHASSTEERING
EC560000
STEERING
Extent of removal:
1 Lower bracket removal
2 Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Headlight
Handlebar Refer to “HANDLEBAR” section.
Front brake hose guide
Front fender
1 Coupler bracket 1
2 Trip meter 1
3 Main switch 1 Disconnect the main switch lead.
4 Steering stem cap 1
5 Steering stem nut 1
6 Front fork 2 Refer to “FRONT FORK” section.
7 Upper bracket 1
8 Steering ring nut 1 Use special tool.
Refer to “REMOVAL POINTS”.
9 Lower bracket 1
12

5 - 119
CHASSWINGARM
EC570000
SWINGARM
Extent of removal:
1 Swingarm removal
Extent of removal Order Part name Q’ty Remarks
SWINGARM REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Brake hose holder
Refer to “FRONT BRAKE AND REAR BRAKE”
section.
Rear brake caliper
Bolt (brake pedal) Shift the brake pedal backward.
Drive chain
1 Drive chain support 1
2 Lower chain tensioner 1
3 Bolt (rear shock absorber-relay arm) 1 Hold the swingarm.
4 Bolt (connecting rod) 1
5 Pivot shaft 1
6 Swingarm 1
1