Yamaha YZ250F Fahrer- Und Wartungshandbuch Seite 202

VALVE CLEARANCE INSPECTION AND ADJUSTMENT
Install the new pads 3 and the valve lift-
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ers 4.
NOTE:
Apply the engine oil on the valve lifters.
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Apply the molybdenum disulfide oil on the
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valve stem ends.
Valve lifter must turn smoothly when
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rotated with a finger.
Be careful to reinstall valve lifters and
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pads in their original place.
Install the camshafts (exhaust and intake).
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Refer to "CAMSHAFTS" section in the
CHAPTER 4.
3 - 22
INSP
ADJ