2006 YAMAHA WR 250F lock

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Page 406 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 65
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 407 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 66
ENG
DEMONTAGE-EINZELHEITEN
Nockenwelle
1. Demontieren:
Rotor-Abdeckschraube 
1 
Kurbelwellen-Abdeck-
schraube 
2 
2. Ausrichten:
OT-Markierung
(auf die Gegenmarkierung)
Arbeitsvorgang:
Die

Page 412 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 71
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 414 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 73
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 416 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 75
ENGCAMSHAFTS
3. Turn:
Crankshaft
Counterclockwise several
turns.
4. Check:
Rotor T.D.C. mark
Align with the crankcase align
mark.
Camshaft match marks
Align with the cylinder head
surface.
O

Page 468 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 127
ENGCLUTCH
Extent of removal Order Part name Q’ty Remarks
10 Friction plate 9
11 Clutch plate  8
12 Cushion spring 1
13 Seat plate 1
14 Nut (clutch boss) 1
Use special tool.
Refer to “REMOV

Page 472 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 131
ENGCLUTCH
EC4A3000REMOVAL POINTS
Clutch boss
1. Remove:
Nut 
1 
Lock washer 
2 
Clutch boss 
3 
NOTE:Straighten the lock washer tab and
use the clutch holding tool 
4 to hold
the clutch bos

Page 476 of 900

YAMAHA WR 250F 2006  Manuale duso (in Italian) 4 - 135
ENGCLUTCH
EC4A5000ASSEMBLY AND INSTALLATION
Push lever shaft
1. Install:
Push lever shaft 
1 
Bolt (push lever shaft) 
2 
NOTE:Apply the lithium soap base grease
on the oil seal lip.
Apply