YAMAHA WR 426F 2002 Owners Manual

YAMAHA WR 426F 2002 Owners Manual WR 426F 2002 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52438/w960_52438-0.png YAMAHA WR 426F 2002 Owners Manual
Trending: lock, warning, maintenance, roof, sensor, radiator cap, coolant

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YAMAHA WR 426F 2002  Owners Manual ENG
4 - 34
SOUPAPES ET RESSORTS DE SOUPAPE
VENTILE UND VENTILFEDERN
VÁLVULAS Y MUELLES DE VÁLVULA
AUSBAU
1. Demontieren: 
Tassenstößel 1 
Ventilplättchen 2 
HINWEIS:
Die jeweilige Einbaulage de

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YAMAHA WR 426F 2002  Owners Manual 4 - 35
ENGVALVES AND VALVE SPRINGS
INSPECTION
Valve
1. Measure:
Stem-to-guide clearance
Out of specification → Replace the
valve guide. Stem-to-guide clearance =
valve guide inside diameter a –

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YAMAHA WR 426F 2002  Owners Manual ENG
4 - 35
SOUPAPES ET RESSORTS DE SOUPAPE
VENTILE UND VENTILFEDERN
VÁLVULAS Y MUELLES DE VÁLVULA
PRÜFUNG
Ventil
1. Messen:
Ventilschaftspiel
Unvorschriftsmäßig → Ven-
tilführung erneuern. Ve

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YAMAHA WR 426F 2002  Owners Manual 4 - 36
ENGVALVES AND VALVE SPRINGS
Valve guide remover:
Intake 4.5 mm (0.18 in)
YM-4116/90890-04116
Exhaust 5.0 mm (0.20 in)
YM-4097/90890-04097
Valve guide installer:
Intake
YM-4117/90890-04117
Exhau

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YAMAHA WR 426F 2002  Owners Manual ENG
4 - 36
SOUPAPES ET RESSORTS DE SOUPAPE
VENTILE UND VENTILFEDERN
VÁLVULAS Y MUELLES DE VÁLVULA
Ventilführungs-Austreiber
Einlaß (4,5 mm)
YM-4116/
90890-04116
Auslaß (5,0 mm)
YM-4097/
90890-040

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YAMAHA WR 426F 2002  Owners Manual 4 - 37
ENGVALVES AND VALVE SPRINGS
5. Measure:
Runout (valve stem)
Out of specification → Replace.
NOTE:
When installing a new valve always replace
the guide.
If the valve is removed or replaced

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YAMAHA WR 426F 2002  Owners Manual ENG
4 - 37
SOUPAPES ET RESSORTS DE SOUPAPE
VENTILE UND VENTILFEDERN
VÁLVULAS Y MUELLES DE VÁLVULA
5. Messen:
Ventilschaftschlag
Unvorschriftsmäßig → 
Erneuern.
HINWEIS:
Beim Einbau eines neuen

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YAMAHA WR 426F 2002  Owners Manual 4 - 38
ENGVALVES AND VALVE SPRINGS
9. Lap:
Valve face
Valve seat
NOTE:
After refacing the valve seat or replacing the
valve and valve guide, the valve seat and
valve face should be lapped.
Lapping s

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YAMAHA WR 426F 2002  Owners Manual ENG
4 - 38
SOUPAPES ET RESSORTS DE SOUPAPE
VENTILE UND VENTILFEDERN
VÁLVULAS Y MUELLES DE VÁLVULA
9. Einschleifen:VentiltellerVentilsitz
HINWEIS:
Nach Bearbeitung des Ventilsitzes oder
Erneuerung

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YAMAHA WR 426F 2002  Owners Manual 4 - 39
ENGVALVES AND VALVE SPRINGS
Valve spring
1. Measure:
Valve spring free length a 
Out of specification → Replace.
2. Measure:
Compressed spring force a 
Out of specification → Replace.
bIn
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