Yamaha FZS600'98, Service Manual

Page: 135 / 364

4-23
VALVES AND VALVE SPRINGS
ENG
2
1
2
2
1
5
4
3
2
a
b
Large
Small
NOTE:
NOTE:
EB403440
CHECKING THE CAMSHAFT CAP
1. Check:
camshaft case
camshaft caps 1
Cracks / damage Replace th camshaft
case and camshaft caps as a set, and
check the camshafts (Refer to “CHECK-
ING THE CAMSHAFTS”.).
camshaft bearing surfaces 2
Damage / pitting / scratches Replace the
camshaft case and camshaft caps as a
set, and check the camshafts (Refer to
“CHECKING THE CAMSHAFTS”.).
2. Check:
oil delivery pipes 1
Damage Replace the defective part(-s).
Dirt / obstruction Wash the pipe(-s) and
then blow it out with compressed air.
EB403700
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
valve stem end
(with an oil stone)
2. Lubricate:
valve stem 1
oil seal
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
3. Install:
valve 1
lower spring seat 2
oil seal 3
valve spring 4
upper spring seat 5
(into the cylinder head)
Install the valve spring with the larger pitch
a
facing up.
b
Smaller pitch
4. Install:
valve cotters 1
Install the valve cotters by compressing the
valve spring with the valve spring compres-
sor
2 and attachment 3 .