Yamaha RS90GTZ Service Manual page 266

VALVES AND VALVE SPRINGS
4. Install:
• Valve cotters
TIP
Install the valve cotters by compressing the
valve spring with the valve spring compressor
and valve spring compressor adapter 19.5
mm (valve spring compressor attachment)
5. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-
face hammer.
NOTICE
Hitting the valve tip with excessive force
could damage the valve.
6. Lubricate:
• Valve pad
• Valve lifter (top side)
(with the recommended lubricant)
• Valve lifter (circumference)
(with the recommended lubricant)
5-41
ENG
Valve spring compressor:
YM-04019, 90890-04019
Valve spring compressor adapter
19.5 mm:
YM-04114
Valve spring compressor
attachment:
90890-04114
Recommended lubricant:
Molybdenum disulfide oil
Recommended lubricant:
Engine oil
.