YAMAHA WR 400F 2001 Owners Manual

YAMAHA WR 400F 2001 Owners Manual WR 400F 2001 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52439/w960_52439-0.png YAMAHA WR 400F 2001 Owners Manual
Trending: oil type, dimensions, engine, tire type, AUX, fuel tank capacity, brake sensor

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YAMAHA WR 400F 2001  Owners Manual ENG
 
4 - 43 
CYLINDRE ET PISTON 
ZYLINDER UND KOLBEN 
CILINDRO Y PISTÓN 
Zylinderboh-
rung “C”WR426F:
95,00– 
95,01 mm
WR400F:
92,00–
92,01 mm
Konizität “T” 0,05 mm
Unrundheit 
“R”0

Page 422 of 762

YAMAHA WR 400F 2001  Owners Manual 4 - 44
ENGCYLINDER AND PISTON
3rd step:
lCalculate the piston-to-cylinder clearance
with following formula:
Piston-to-cylinder clearance =
Cylinder bore “C” –
Piston skirt diameter “P”
Pisto

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YAMAHA WR 400F 2001  Owners Manual ENG
4 - 44
CYLINDRE ET PISTON
ZYLINDER UND KOLBEN
CILINDRO Y PISTÓN
3. Schritt
lKolbenlaufspiel nach der fol-
genden Formel berechnen:
Kolbenlaufspiel = 
Zylinderbohrung “C” – 
Kolbenschaftdurc

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YAMAHA WR 400F 2001  Owners Manual 4 - 45
ENGCYLINDER AND PISTON
3. Measure:
lRing end gap 
Out of specification ® Replace.
NOTE:
You cannot measure the end gap on the
expander spacer of the oil control ring. If the oil
control ring r

Page 425 of 762

YAMAHA WR 400F 2001  Owners Manual ENG
4 - 45
CYLINDRE ET PISTON
ZYLINDER UND KOLBEN
CILINDRO Y PISTÓN
3. Messen:
lStoßspiel
Unvorschriftsmäßig ® Kol-
benring erneuern.
HINWEIS:
Das Stoßspiel der Ölabstreifring-Ex-
panderfeder k

Page 426 of 762

YAMAHA WR 400F 2001  Owners Manual 4 - 46
ENGCYLINDER AND PISTON
2. Measure:
lPiston pin-to-piston clearance
ASSEMBLY AND INSTALLATION
Piston
1. Install:
lPiston rings
Onto the piston.
NOTE:
lBe sure to install the piston rings so that

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YAMAHA WR 400F 2001  Owners Manual ENG
4 - 46
CYLINDRE ET PISTON
ZYLINDER UND KOLBEN
CILINDRO Y PISTÓN
2. Messen:
lKolbenbolzenspiel
ZUSAMMENBAU UND MONTAGE 
Kolben
1. Montieren:
lKolbenringe
(auf den Kolben)
HINWEIS:
lDie Kolbenringe

Page 428 of 762

YAMAHA WR 400F 2001  Owners Manual 4 - 47
ENG
2. Position:
lTop ring
l2nd ring
lOil 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 2001  Owners Manual ENG
4 - 47
2. Montieren:
l1. Kompressionsring (Topring)
l2. Kompressionsring
lÖlabstreifring
Ringstöße laut Abbildung ver-
setzen.
aRingstoß (1. Kompressionsring)
bRingstoß (2. Kompressionsring)

Page 430 of 762

YAMAHA WR 400F 2001  Owners Manual ENG
4 - 48
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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