Yamaha XT660R S Service Manual page 271

VALVES AND VALVE SPRINGS
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4. Install:
• valve cotters
NOTE:
_
Install the valve cotters by compressing the
valve spring with the valve spring compressor
1 and the valve spring compressor attach-
ment 2.
Valve spring compressor
98090-04019
Valve spring compressor attach-
ment
90890-01243
5. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-face
hammer.
CAUTION:
_
Hitting the valve tip with excessive force
can damage the valve.
ENG