2004 YAMAHA WR 250F oil

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Page 302 of 864

YAMAHA WR 250F 2004  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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  Manuale de Empleo (in Spanish) 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