engine YAMAHA WR 400F 2002 Notices Demploi (in French)

YAMAHA WR 400F 2002 Notices Demploi (in French) WR 400F 2002 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52438/w960_52438-0.png YAMAHA WR 400F 2002 Notices Demploi (in French)

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 11
ENGCARBURETOR
EC466020
HANDLING NOTE
CAUTION:
Do not loosen the screws {TPS (throttle
position sensor)} 1 except when changing
the TPS (throttle position sensor) due to
failure because it will

Page 386 of 776

YAMAHA WR 400F 2002  Notices Demploi (in French) ENG
4 - 22
CAMSHAFTS
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

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 41
ENG
3. Install:
Valve cotters
NOTE:
While compressing the valve spring with a
valve spring compressor 1 install the valve
cotters.
4. To secure the valve cotters onto the
valve stem, lightly t

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 47
ENGCYLINDER AND PISTON
2. Measure:
Piston pin-to-piston clearance
ASSEMBLY AND INSTALLATION
Piston
1. Install:
Piston rings
Onto the piston.
NOTE:
Be sure to install the piston rings so that

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 48
ENG
2. Position:
Top ring
2nd ring
Oil ring
Offset the piston ring end gaps as
shown.
aTop ring end
b2nd ring end
cOil ring end (upper)
dOil ring
eOil ring end (lower)
45°
135°135°
a
b ce

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YAMAHA WR 400F 2002  Notices Demploi (in French) ENG
4 - 49
CLUTCH (WR426F)
CLUTCH (WR426F)
CLUTCH
Extent of removal:1 Push rod and push lever removal2 Push pod 1 disassembly
3 Friction plate and clutch plate removal4 Clutch housing removal
Extent o

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 53
ENGCLUTCH (WR426F)
EC4A5000
ASSEMBLY AND INSTALLATION
Push lever
1. Install:
Push lever 1 
Bolt (push lever)
NOTE:
Apply the lithium soap base grease on the oil
seal lip.
Apply the engine o

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 54
ENGCLUTCH (WR426F)
3. Bend the lock washer 1 tab.
4. Install:
Seat plate 1
Clutch damper spring 2 
NOTE:
Install the seat plate with its chamfered por-
tion a facing the clutch boss 3.
Inst

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YAMAHA WR 400F 2002  Notices Demploi (in French) 4 - 55
ENGCLUTCH (WR426F)
7. Install:
Push rod 2 1 
Ball 2 
Push rod 1 3 
NOTE:
Apply the engine oil on the push rod 1, 2 and
ball.
8. Install:
Pressure plate 1 
9. Install:
Clutch spring
Bolt (

Page 454 of 776

YAMAHA WR 400F 2002  Notices Demploi (in French) ENG
4 - 56
CLUTCH (WR400F)
CLUTCH (WR400F)
CLUTCH
Extent of removal:1 Push rod and push lever removal2 Push rod 1 disassembly
3 Friction plate and clutch plate removal4 Clutch housing removal
Extent o