Yamaha F150B Service Manual page 217

b
b
a
4. Remove the timing belt, driven sprockets,
and camshafts. See "Removing the
timing belt, driven
camshaft" (7-28).
5. Remove the valve shim c from the valve
lifter d using compressed air.
c
d
TIP:
Do not mix the valve train parts. Keep them
organized in their proper groups.
6. Measure the valve shim thickness using
a micrometer, and
measurement data.
7. Select the necessary valve shim by
calculating its thickness
following formula.
Necessary valve shim thickness =
Removed valve shim thickness +
Measured valve clearance – Specified
valve clearance
Example:
If the "Removed valve shim thickness" is
2.10 mm, the "Measured valve clearance" is
0.30 mm and the "Specified valve clearance"
is 0.20 mm, then the "Necessary valve shim
thickness" = 2.10 + 0.30 – 0.20 = 2.20 mm.
a
sprocket, and
c
d
then note the
using the
Power unit (check and adjustment)
8. Install the necessary valve shim into the
valve lifter.
9. Install the camshafts, driven sprockets,
and timing belt. See "Installing the timing
belt, driven sprocket, and camshaft" (7-
30).
10. Install the stator assembly (lighting coil).
11. Install the flywheel
"Installing the flywheel magnet" (7-6).
12. Measure each valve clearance and
adjust again if out of specification.
13. Install the cylinder head cover, and then
tighten the bolts e to the general
tightening torque in 2 stages (both
stages).
e
14. Install the all spark plugs, and then
tighten spark plugs to the specified
torque.
Spark plug:
25 N·m (2.5 kgf·m, 18.4 ft·lb)
15. Connect the all spark plug wires.
16. Install all parts
disassembly. NOTICE: Check that the
wiring harness, hoses, and other
parts do not interfere with any moving
parts.
magnet. See
10
removed during
7-4
0
1
2
3
4
5
6
7
8
9
A