Installing The Valves - Yamaha TW125 1999 Service Manual

VALVES AND VALVE SPRINGS
EAS00246

INSTALLING THE VALVES

The following procedure applies to all of the
valves and related components.
1. Deburr:
2. Lubricate:
3. Install:
NOTE:
Install the valve springs with the larger pitch a
facing up.
4. Install:
NOTE:
Install the valve cotters by compressing the
valve springs with the valve spring compressor
2 and attachment 3 .
5. To secure the valve cotters onto the valve
Hitting the valve tip with excessive force
could damage the valve.
4-23
S valve stem end
(with an oil stone)
S valve stem
S oil seal
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
S valve 1
S lower spring seat 2
S oil seal 3
S valve springs 4
S upper spring seat 5
(into the cylinder head)
S valve cotters 1
Valve spring compressor
90890-04019
Attachment
90890-04108
stem, lightly tap the valve tip with a soft-face
hammer.
CAUTION:
ENG