Yamaha YFM250RX 2008 Service Manual page 146

VALVES AND VALVE SPRINGS
4. Install:
• Valve cotters
NOTE: NOTE:
Install the valve cotters by compressing the
valve spring with the valve spring compressor
and the valve spring compressor attachment
.
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
could damage the valve.
4-30
ENG
Valve spring compressor
90890-04019, YM-04019
Valve spring compressor
attachment
90890-01243
Valve spring compressor adapter
(26 mm)
YM-01253-1