Yamaha YZ 2017 Series Owner's Service Manual page 231

Valve spring compressor
90890-04019
Valve spring compressor
YM-04019
Valve spring compressor attach-
ment
90890-04108
Valve spring compressor adapter
22 mm
YM-04108
5. To fasten the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-face
hammer.
ECA
NOTICE
Hitting the valve tip with excessive force
could damage the valve.
6. Lubricate:
• Adjusting pad "1"
• Valve lifter "2"
2
E
1
5-30
VALVES AND VALVE SPRINGS
7. Install:
• Adjusting pad
• Valve lifter
TIP
• Check that the valve lifter turns smoothly
when rotated with your finger.
• Make sure that the valve lifter and the adjust-
ing pad are reinstalled in their original posi-
tions.