2005 YAMAHA WR 250F Chain

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Page 296 of 864

YAMAHA WR 250F 2005  Owners Manual 3 - 105
INSP
ADJ
LUBRIFICATION
Pour assurer le bon fonctionnement de
tous les organes, lubrifier la moto avant
la première utilisation, après le rodage,
ainsi qu’après chaque course.
1
Tous les c

Page 376 of 864

YAMAHA WR 250F 2005  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 377 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 52
ENG
ARBRES A CAMES
COUVRE-CULASSEOrganisation de la dépose:1 Dépose du couvre-culasse
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
DEPOSE DU COUVRE-CULASSE
Préparation à

Page 380 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 55
ENGCAMSHAFTS
CAMSHAFTS
Extent of removal:
1 Camshaft removal
Extent of removal Order Part name Q’ty Remarks
CAMSHAFTS REMOVAL
1 Timing mark accessing screw 1
Refer to “REMOVAL POINTS”. 2

Page 381 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 56
ENG
ARBRES A CAMESOrganisation de la dépose:1 Dépose de l’arbre à cames
Organisation de la dépose Ordre Nom de la pièce QtéRemarques
DEPOSE DES ARBRES A CAMES
1Vis d’accès de repère

Page 384 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 59
ENGCAMSHAFTS
REMOVAL POINTS
Camshaft
1. Remove:
Timing mark accessing screw
1 
Crankshaft end accessing
screw 
2 
2. Align:
T.D.C. mark
With align mark.
Checking steps:
Turn the crankshaft

Page 386 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 61
ENGCAMSHAFTS
5. Remove:
Exhaust camshaft 
1 
Intake camshaft 
2 
NOTE:Attach a wire 
3 to the timing chain to
prevent it from falling into the crank-
case.
1
2
3
INSPECTION
Camshaft
1. Inspec

Page 388 of 864

YAMAHA WR 250F 2005  Owners Manual 4 - 63
ENGCAMSHAFTS
4. Measure:
Camshaft-to-cap clearance 
Out of specification 
→ Mea-
sure camshaft outside diame-
ter. 
5. Measure: 
Camshaft outside diameter 
a 
Out of specification 
→ 
Rep