POWR
Power unit
5-35
67C3K11
9.
If the valve seat contact area is too nar-
row and situated near the bottom edge of
the valve face, use a 60° cutter to cut the
bottom edge of the valve seat, and then
use a 45° cutter to center the area and
set its width.
b
Previous contact width
10. After refacing the valve seat to the speci-
fied contact width, apply a thin, even
layer of lapping compound onto the valve
seat, and then lap the valve using a valve
lapper.
CAUTION:
Do not get the lapping compound on the
valve stem and valve guide.
11. After every lapping procedure, be sure to
clean off any remaining lapping com-
pound from the cylinder head and the
valve.
12. Check the valve seat contact area of the
valve again.
NOTE:
To check the valve seat contact area, see
“Checking the valve seat” (5-32).
Checking the rocker arm and rocker
arm shaft
1.
Check the rocker arms, rocker arm shaft,
and contact surface
a
of each rocker
arm. Replace if worn.
2.
Measure the rocker arm inside diameter
b
and rocker arm shaft outside diameter
c
. Replace if out of specification.
Checking the camshaft
1.
Measure the cam lobe height
a
and
width
b
. Replace if out of specification.
S6AG5J50J
60˚
b
S67C5098
Rocker arm inside diameter
b
:
16.000–16.018 mm
(0.6299–0.6306 in)
Rocker arm shaft outside
diameter
c
:
15.971–15.991 mm
(0.6288–0.6296 in)
S67C5099
b
c
a
b
Содержание F30A
Страница 1: ...F30A F40B SERVICE MANUAL 67C 28197 3K 11 ...
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Страница 26: ...GEN INFO General information 1 21 67C3K11 MEMO ...
Страница 150: ...POWR Power unit 5 55 67C3K11 MEMO ...
Страница 172: ...LOWR Lower unit 6 21 67C3K11 Shimming S67C6063 T1 T2 B2 A2 F R P T3 B3 A3 42 0 T1 T2 B1 28 0 28 0 B2 A2 A1 ...
Страница 236: ...BRKT Bracket unit 7 55 67C3K11 MEMO ...
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Страница 283: ...YAMAHA MOTOR CO LTD Printed in China Aug 2007 1 2 1 CR E ...