2004 YAMAHA WR 250F oil

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Page 302 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 111
INSP
ADJ
BATTERY INSPECTION AND 
CHARGING
WARNING
Batteries generate explosive
hydrogen gas and contain electro-
lyte which is made of poisonous
and highly caustic sulfuric acid. 
Therefore, a

Page 318 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 127
INSP
ADJ
6. Install:
Battery
Battery band
7. Connect:
Battery leads
(to the battery terminals)
CAUTION:
First, connect the positive lead 1,
then the negative lead 2.
8. Check:
Battery term

Page 322 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 131
INSP
ADJ
REPLACING THE HEADLIGHT 
BULBS
1. Remove:
Headlight
Refer to “SEAT, FUEL TANK
AND SIDE COVERS” section
in the CHAPTER 4.
2. Remove:
Headlight bulb holder cover 
1 
3. Detach:
H

Page 376 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 51
ENGCAMSHAFTS
CAMSHAFTS
CYLINDER HEAD COVER
Extent of removal:
1 Cylinder head cover removal
Extent of removal Order Part name Q’ty Remarks
CYLINDER HEAD COVER REMOVAL
Preparation for removal

Page 390 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 65
ENGCAMSHAFTS
Decompression system
1. Check:
Decompression system
Checking steps:
Check that the decompression
mechanism cam 
1 moves
smoothly.
Check that the decompression
mechanism cam leve

Page 392 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 67
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 396 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 71
ENGCAMSHAFTS
7. Install:
Oil tank breather hose
Cylinder head breather hose 
Spark plug
T R..13 Nm (1.3 m · kg, 9.4 ft · lb)
7. Monter:
Durit de mise à l’air de réservoir
d’huile
D

Page 398 of 864

YAMAHA WR 250F 2004  Owners Manual 4 - 73
ENGCYLINDER HEAD
CYLINDER HEAD
Extent of removal:
1 Cylinder head removal
Extent of removal Order Part name Q’ty Remarks
CYLINDER HEAD REMOVAL
Preparation for removal Seat and fuel tank Refer