2004 YAMAHA WR 250F width

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Page 418 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 93
ENGVALVES AND VALVE SPRINGS
9. Lap:
Valve face
Valve seat
NOTE:After refacing the valve seat or
replacing the valve and valve guide,
the valve seat and valve face should
be lapped.
Lapping st

Page 468 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 143
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
REMOVAL POINTS
Impeller shaft
1. Remove:
Impeller 
1 
Washer 
2 
Impeller shaft 
3 
NOTE:Hold the impeller shaft on its width
acr

Page 472 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 147
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
Impeller shaft
1. Install:
Impeller shaft 
1 
Washer 
2 
Impeller 
3 
NOTE:Take care so that the oil seal lip is
not damaged or

Page 562 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 237
ENGCRANKCASE AND CRANKSHAFT
EC4N4201Crankshaft
1. Measure:
Runout limit 
a 
Small end free play limit 
b 
Connecting rod big end side
clearance 
c 
Crank width 
d 
Out of specification
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