Yamaha R1 Series 2015 Service Manual page 375

Valve spring compressor
90890-04019
Valve spring compressor
YM-04019
Valve spring compressor attach-
ment
90890-01243
Valve spring compressor adapter
(26 mm)
YM-01253-1
5. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-face
hammer.
ECA13800
NOTICE
Hitting the valve tip with excessive force
could damage the valve.
6. Lubricate:
• Valve pad
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
7. Install:
• Valve pad
TIP
Each valve pad must be reinstalled in its original
position.
VALVES AND VALVE SPRINGS
5-34