5 - 83
ENG
VALVES AND VALVE SPRINGS
Valve guide remover:
Intake:
4.0 mm (0.16 in)
YM-4111/
90890-04111
Exhaust:
4.5 mm (0.18 in)
YM-4116/
90890-04116
Valve guide installer:
Intake:
4.0 mm (0.16 in)
YM-4112/
90890-04112
Exhaust:
4.5 mm (0.18 in)
YM-4117/
90890-04117
Valve guide reamer:
Intake:
4.0 mm (0.16 in)
YM-4113/
90890-04113
Exhaust:
4.5 mm (0.18 in)
YM-4118/
90890-04118
NOTE:
After replacing the valve guide
reface the valve seat.
3.
Inspect:
• Valve face
Pitting/wear
→
Grind the face.
• Valve stem end
Mushroom shape or diameter
larger than the body of the
stem
→
Replace.
4.
Measure:
• Margin thickness
a
Out of specification
→
Replace.
Margin thickness:
Intake:
0.8 mm (0.0315 in)
Exhaust:
0.7 mm (0.0276 in)
Outil de dépose de guide de
soupape:
Admission:
4,0 mm (0,16 in)
YM-4111/90890-04111
Echappement:
4,5 mm (0,18 in)
YM-4116/90890-04116
Outil de pose de guide de
soupape:
Admission:
4,0 mm (0,16 in)
YM-4112/90890-04112
Echappement:
4,5 mm (0,18 in)
YM-4117/90890-04117
Alésoir de guide de
soupape:
Admission:
4,0 mm (0,16 in)
YM-4113/90890-04113
Echappement:
4,5 mm (0,18 in)
YM-4118/90890-04118
N.B.:
Après avoir remplacé le guide de
soupape, rectifier le siège de soupape.
3.
Contrôler:
• Portée de soupape
Piqûres/usure
→
Rectifier la por-
tée de soupape.
• Embout de queue de soupape
Extrémité en forme de champi-
gnon ou diamètre supérieur au
corps de la queue de soupape
→
Remplacer.
4.
Mesurer:
• Epaisseur de rebord
a
Hors spécifications
→
Rempla-
cer.
Epaisseur de rebord:
Admission:
0,8 mm (0,0315 in)
Echappement:
0,7 mm (0,0276 in)
SOUPAPES ET RESSORTS DE SOUPAPES
Summary of Contents for WR250F(W)
Page 51: ...1 26 GEN INFO MEMO...
Page 89: ...1 64 GEN INFO MEMO...
Page 189: ...2 96 SPEC MEMO...
Page 285: ...3 74 INSP ADJ MEMO...
Page 379: ...4 20 TUN MEMO...
Page 831: ...7 10 ELEC MEMO...
Page 847: ...7 26 ELEC MEMO...
Page 869: ...7 48 ELEC MEMO...
Page 877: ...7 56 ELEC MEMO...
Page 893: ...7 72 ELEC MEMO...
Page 903: ...7 82 ELEC MEMO...
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