2003 YAMAHA WR 250F transmission

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Page 570 of 860

YAMAHA WR 250F 2003  Owners Manual 4 - 245
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H3000REMOVAL POINTSEC4H3230Transmission
1. Remove:
Main axle 
1 
Drive axle 
2 
Shift cam
Shift fork 3 
Shift fork 2 
Shift fork 1 
NOTE:Rem

Page 572 of 860

YAMAHA WR 250F 2003  Owners Manual 4 - 247
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
2. Inspect:
Shift cam 
1 
Segment 
2 
Wear/damage 
→ Replace.
3. Check:
Shift fork movement
Unsmooth operation 
→ 
Replace shift fork.
NOTE:For

Page 574 of 860

YAMAHA WR 250F 2003  Owners Manual 4 - 249
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
2. Install:
2nd wheel gear (28T) 
1 
4th wheel gear (25T) 
2 
3rd wheel gear (28T) 
3 
5th wheel gear (22T) 
4 
1st wheel gear (31T) 
5 
O-ring

Page 576 of 860

YAMAHA WR 250F 2003  Owners Manual 4 - 251
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
5. Install:
Shift fork 1 (L) 
1 
Shift fork 2 (C) 
2 
Shift fork 3 (R) 
3 
Shift cam 
4 
To main axle and drive axle.
NOTE:Apply the molybdenum d

Page 583 of 860

YAMAHA WR 250F 2003  Owners Manual 5 - 6
CHAS
ROUE ARRIEREOrganisation de la dépose:1 Dépose de la roue arrière2 Dépose du roulement de roue
3 Dépose du disque de frein 
Organisation de la dépose Ordre Nom de pièce QtéRemarques

Page 586 of 860

YAMAHA WR 250F 2003  Owners Manual 5 - 9
CHASFRONT WHEEL AND REAR WHEEL
EC593000REMOVAL POINTSEC523101Rear wheel
1. Remove:
Wheel 
1 
NOTE:Push the wheel forward and remove
the drive chain 
2.
EC513201Wheel bearing (if necessary)
1. R

Page 596 of 860

YAMAHA WR 250F 2003  Owners Manual 5 - 19
CHASFRONT WHEEL AND REAR WHEEL
2. Install:
Brake disc 
1 
Bolt (brake disc) 
2 
NOTE:Tighten the bolts in stage, using a
crisscross pattern.
T R..14 Nm (1.4 m · kg, 10 ft · lb)
3. Install:

Page 598 of 860

YAMAHA WR 250F 2003  Owners Manual 5 - 21
CHASFRONT WHEEL AND REAR WHEEL
7. Install:
Left drive chain puller 
1 
Wheel axle 
2 
NOTE:Install the left drive chain puller,
and insert the wheel axle from left
side.
Apply the lithium s
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