Yamaha F80B, Service Manual

Page: 104 / 249

POWR
Power unit
5-35
6D93G11
3. Install the valve shims and valve lifters.
NOTE:
• Apply engine oil to the valve shims and
valve lifters before installation.
• Install the valve shims and valve lifters in
their original positions.
4. Install the camshaft (intake)
1
and cam-
shaft (exhaust)
2
with the new oil seals
3
.
NOTE:
• Apply molybdenum disulfide grease to the
cam lobes.
• Be sure to install the camshaft with the fuel
pump drive cam
b
on the intake side.
5. Check that the camshaft dowel holes
c
are in the position shown in the illustra-
tion. Adjust if necessary.
6. Install the camshaft caps in their proper
positions as shown with the stamped
numbers upside down.
7. Tighten the camshaft cap bolts to the
specified torques in two stages and in the
sequence shown.
NOTE:
Apply engine oil to the camshaft caps and
camshaft cap bolts before installation.
8. Install the cylinder head cover.
S6D85490
M M
M M
E
E
E
2
1
3
b
S1280B
S6D85500
c
T
R
.
.
Camshaft cap bolt:
1st: 8 N·m (0.8 kgf·m, 5.9 ft·lb)
2nd: 17 N·m (1.7 kgf·m, 12.5 ft·lb)
S6D85510
5
2 A
1
1
A
7
2 A
2
2 A
3
2 A
4
2 A
5
2 A
8
2 A
9
2 A
10
2 A
6
1
A
6
7
8
9
10
1
1
A
1
2
3
4
5