2007 YAMAHA WR 250F light

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Page 468 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 61
ENGCAMSHAFTS
Fit the timing chain 
3 onto both
camshaft sprockets and install
the camshafts on the cylinder
head.
NOTE:The camshafts should be installed
onto the cylinder head so that the
punc

Page 494 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 87
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 500 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 93
ENGVALVES AND VALVE SPRINGS
4. To secure the valve cotters onto
the valve stem, lightly tap the
valve tip with a piece of wood.
CAUTION:
Hitting the valve tip with excessive
force could damage

Page 640 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 233
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.
N

Page 648 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 241
ENGCRANKCASE AND CRANKSHAFT
2. Check:
Shifter operation
Transmission operation
Unsmooth operation 
→ 
Repair.
3. Install:
Oil strainer 
1 
Bolt (oil strainer) 
2 
T R..10 Nm (1.0 m · kg

Page 656 of 912

YAMAHA WR 250F 2007  Owners Manual 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 714 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 51
CHASFRONT BRAKE AND REAR BRAKE
Front brake master cylinder
1. Install:
Brake master cylinder 
1 
Brake master cylinder bracket
2 
Bolt (brake master cylinder
bracket) 
3 
NOTE:Install the b

Page 716 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 53
CHASFRONT BRAKE AND REAR BRAKE
3. Install:
Spring 
1 
Brake pedal 
2 
O-ring 
3 
Bolt (brake pedal) 
4 
Clip 
5 
NOTE:Apply the lithium soap base grease
on the bolt, O-ring and brake pedal
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