Yamaha YZF-R1S Service Manual - Eng
5-33
VALVES AND VALVE SPRINGS
ENG
NOTE:
NOTE:
NOTE:
2. Lubricate:
Svalve stem
1
Svalve stem seal
2
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
3. Install:
Svalve
1
Slower spring seat
2
Svalve stem seal
3
Svalve spring
4
Supper spring seat
5
(into the cylinder head)
Install the valve spring with the larger pitch
a
facing up.
b
Smaller pitch
Make sure that each valve is installed in its origi-
nal place. Refer to the following embossed
marks.
Right and left intake valve(-s): “5VY :”
Middle intake valve(-s): “5VY
.
”
Exhaust valve(-s): “5VY”
4. Install:
Svalve cotters
1
Install the valve cotters by compressing the
valve spring with the valve spring compressor
2
and the valve spring compressor attachment
3
.
Valve spring compressor
90890-04019, YM-04019
Valve spring compressor
attachment
Intake valve
90890-04114, YM-4114
Exhaust valve
90890-04108, YM-4108