2007 YAMAHA WR 250F transmission

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Page 652 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 245
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H0000
TRANSMISSION, SHIFT CAM AND SHIFT FORK
Extent of removal:
1 Shift fork, shift cam, main axle and drive axle removal
Extent of removal Order P

Page 656 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 249
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 658 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 251
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 660 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 253
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
2. Install:
2nd wheel gear (28T) 
1 
4th wheel gear (23T) 
2 
3rd wheel gear (23T) 
3 
5th wheel gear (17T) 
4 
1st wheel gear (31T) 
5 
O-ring

Page 662 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 5 - 255
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 669 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 6 - 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 la pièce QtéRemarqu

Page 672 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 6 - 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 682 of 912

YAMAHA WR 250F 2007  Manuale duso (in Italian) 6 - 19
CHASFRONT WHEEL AND REAR WHEEL
5. Install:
Wheel
NOTE:Install the brake disc 
1 between the
brake pads 
2 correctly.
6. Install:
Drive chain 
1 
NOTE:Push the wheel 
2 forward and install
the
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