Yamaha WR450F 2004 Fahrer- Und Wartungshandbuch Seite 382

VALVES AND VALVE SPRINGS
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 - 41
Adjusting pad 1
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Valve lifter 2
G
ENG