engine YAMAHA WR 250F 2002 Manual Online

YAMAHA WR 250F 2002 Manual Online WR 250F 2002 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52338/w960_52338-0.png YAMAHA WR 250F 2002 Manual Online

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YAMAHA WR 250F 2002 Manual Online 4 - 85
ENGENGINE REMOVAL
EC4M3000
REMOVAL POINTS
EC4F3100
Drive sprocket
1. Remove:
Nut (drive sprocket) 1 
Lock washer 2 
NOTE:
Straighten the lock washer tab.
Loosen the nut while applying the r

Page 440 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 86
ENGENGINE REMOVAL
EC4M5000
ASSEMBLY AND INSTALLATION
Engine installation
1. Install:
Engine 1 
Install the engine from right side.
Pivot shaft 2 
Engine mounting bolt (lower) 3 
Lower engin

Page 442 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 87
ENGENGINE REMOVAL
2. Install:
Lock washer 1 
Nut (drive sprocket) 2 
NOTE:
Tighten the nut while applying the rear brake.
T R..75 Nm (7.5 m · kg, 54 ft · lb)
3. Bend the lock washer tab to

Page 444 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 88
ENGCRANKCASE AND CRANKSHAFT
CRANKCASE AND CRANKSHAFT
Extent of removal:1 Crankcase separation2 Crankshaft removal
Extent of removal Order Part name Q’ty Remarks
CRANKCASE AND CRANK-
SHAFT REM

Page 450 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 91
ENGCRANKCASE AND CRANKSHAFT
REMOVAL POINTS
Crankcase
1. Separate:
Right crankcase
Left crankcase
Separation steps:
Remove the crankcase bolts 1, hose
guide 2 and clutch cable holder 3.
NOTE:

Page 452 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 92
ENGCRANKCASE AND CRANKSHAFT
Crankshaft
1. Remove:
Crankshaft 1 
Use the crankcase separating tool 2.
CAUTION:
Do not use a hammer to drive out the
crankshaft.
Crankcase bearing
1. Remove:
Bea

Page 460 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 96
ENGCRANKCASE AND CRANKSHAFT
6. Tighten:
Hose guide 1 
Clutch cable holder 2 
Bolt (crankcase) 3 
NOTE:
Tighten the crankcase tightening bolts in
stage, using a crisscross pattern.
T R..12 Nm

Page 462 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 97
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 Par

Page 470 of 694

YAMAHA WR 250F 2002 Manual Online 4 - 101
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 disu

Page 472 of 694

YAMAHA WR 250F 2002 Manual Online  
5 - 1
CHAS
 
EC500000 
CHASSIS 
EC590000 
FRONT WHEEL AND REAR WHEEL 
EC598000 
FRONT WHEEL 
FRONT WHEEL AND REAR WHEEL 
Extent of removal:  
1  
 Front wheel removal  
2  
 Wheel bearing removal