Yamaha F200B, Руководство по обслуживанию

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7-50
7
Checking the camshaft
1. Check the edge and face of the flange on
the camshafts (PORT) and intake cam-
shaft (STBD) that is used for the cam
position sensor. Replace the camshaft if
damaged, rough, or scratched.
TIP:
• Be careful not scratch or damage the face
of the flange.
• If there is a scratch more than 0.2 mm
(0.008 in) deep or more than 0.5 mm (0.020
in) wide on the surface of the flange, a mal-
function may occur in the cam position sen-
sor signal.
2. Measure the cam lobe height
a
and
width
b
.
3. Measure the camshaft runout.
4. Measure the camshaft journal diameter
c
and cylinder head journal inside diam-
eter
d
. Replace the camshaft or cylinder
head assembly, or both if out of specifi-
cations.
Installing the camshaft and driven
sprocket
If the valve clearances are adjusted or any
parts related to valve movement are replaced
after installing the timing belt, check the valve
clearances. See “Checking the valve clear-
ance” (7-2).
Cam lobe height
a
:
Intake:
46.311–46.411 mm (1.8233–1.8272
in)
Exhaust:
45.360–45.460 mm (1.7858–1.7898
in)
Cam lobe width
b
:
Intake and exhaust:
35.950–36.050 mm (1.4154–1.4193
in)
a
b
Camshaft runout:
0.015 mm (0.0006 in)
Camshaft journal diameter
c
:
24.960–24.980 mm (0.9827–0.9835
in)
Camshaft cap journal diameter
d
:
25.000–25.021 mm (0.9843–0.9851
in)
c
c
d
d
Camshaft