Yamaha YZ426F(P) Owner's Service Manual page 316

Fahrer- und wartungs-handbuch
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VALVES AND VALVE SPRINGS
3. Install:
NOTE:
While compressing the valve spring with a
valve spring compressor 1 install the valve
cotters.
4. To secure the valve cotters onto the
CAUTION:
Hitting the valve tip with excessive force
could damage the valve.
5. Install:
NOTE:
Apply the engine oil on the valve lifters.
G
Apply the molybdenum disulfide oil on the
G
valve stem end.
Valve lifter must turn smoothly when rotated
G
with a finger.
Be careful to reinstall valve lifters and pads
G
in their original place.
4 - 39
Valve cotters
G
Valve spring compressor:
YM-4019/90890-04019
valve stem, lightly tap the valve tip with a
piece of wood.
Adjusting pad 1
G
Valve lifter 2
G
ENG

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