2002 YAMAHA WR 250F compression ratio

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Page 320 of 694

YAMAHA WR 250F 2002  Owners Manual 4 - 26
ENGCAMSHAFTS
Timing chain tensioner
1. Check:
While pressing the tensioner rod lightly
with fingers, use a thin screwdriver 1
and wind the tensioner rod up fully
clockwise.
When releasing the

Page 328 of 694

YAMAHA WR 250F 2002  Owners Manual 4 - 30
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

Page 329 of 694

YAMAHA WR 250F 2002  Owners Manual 4 - 30
ENG
CULASSE
ZYLINDERKOPF
TESTATA DEL CILINDRO
ZYLINDERKOPF
Demontage-Arbeiten:1 Zylinderkopf demontieren
Demontage-ArbeitenReihen-folgeBauteil Anz. Bemerkungen
ZYLINDERKOPF DEMONTIEREN
Vorberei

Page 334 of 694

YAMAHA WR 250F 2002  Owners Manual  
4 - 33
ENG
 
3. Install: 
 
Washer   
1  
  
 
Cable guide   
2  
  
 
Bolts [L=145 mm (5.71 in)]   
3  
  
 
Bolts [L=135 mm (5.31 in)]  
4  
  
 
Nuts  
5 
 
NOTE:
 
 
Apply the molybdenum d

Page 335 of 694

YAMAHA WR 250F 2002  Owners Manual ENG
4 - 33
3. Montieren:
Unterlegscheibe 1 
Seilzugführng 2 
Schrauben [L = 145 mm] 3 
Schrauben [L = 135 mm] 4 
Muttern 5 
HINWEIS:
Molybdändisulfidfett auf Gewinde
und Berührungsflächen de

Page 434 of 694

YAMAHA WR 250F 2002  Owners Manual 4 - 83
ENGENGINE REMOVAL
EC4M0000
ENGINE REMOVAL
Extent of removal Order Part name Q’ty Remarks
ENGINE REMOVAL
Preparation for removal Hold the machine by placing the 
suitable stand under the frame

Page 435 of 694

YAMAHA WR 250F 2002  Owners Manual 4 - 83
ENG
DEPOSE DU MOTEUR
MOTOR DEMONTIEREN
RIMOZIONE DEL MOTORE
MOTOR DEMONTIEREN
Demontage-ArbeitenReihen-
folgeBauteil Anz. Bemerkungen
MOTOR DEMONTIEREN
WARNUNG
Das Motorrad gegen Umfallen siche

Page 552 of 694

YAMAHA WR 250F 2002  Owners Manual 5 - 41
CHAS
EC5B0000
HANDLEBAR
Extent of removal:1 Handlebar removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalHANDLEBAR REMOVAL
Headlight 
1 Decompression cable 1 Discon
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