173
(
4.960 mm
)
Min. allowable dimension:
Valve stem diameter (exhaust)
∅
0.1949 in
(
4.950 mm
)
-
Estimate the clearance between valve stem and
valve guide.
Standard clearance:
Valve stem-guide (intake)
0.0005 -0.0016 in
(
0.013-0.040 mm
)
Standard clearance:
Valve stem-guide (exhaust)
0.0010-0.0020 in
(
0.025-0.052 mm
)
Max. allowable clearance:
Valve stem-guide (intake)
0.0024 in
(
0.062 mm
)
Max. allowable clearance:
Valve stem-guide (exhaust)
0.0028 in
(
0.072 mm
)
-
Check the wear on the surfaces on the ends of
the valve stems, in contact with the tappets, is
not excessive.
-
Measure the length of the valve.
Standard dimension:
Valve length (intake)
3.724 in
(
94.6 mm
)
Standard dimension:
Valve length (exhaust)
3.717 in
(
94.4 mm
)
-
If any of the sealing surface of the valve does
not conform to the specified wear limits, or is
damaged or curved, replace the valve with a
new one.
1 = YES
2 = NO
-
It is advisable to grind the valve seats, which
should be done using a fine grade grinding
paste. During the grinding operation hold the
cylinder in such a position as to keep the valve
axis horizontal. This will avoid grinding paste
residues penetrating the seal between the valve
guide and stem; see figure.
Warning
– In order to avoid scoring the sealing
surfaces, do not continue rotating the valve after
the grinding paste has run out. Thoroughly clean
the cylinder head and valves with a suitable
product according to the grinding paste used.
Note
: Do not change the valve assembly position.
Summary of Contents for GT 200
Page 1: ......
Page 90: ...90 9 1 2 Turn Signal Lights Horn Services and Accessory Pre Wiring ...
Page 151: ...151 10 10 Lubrication Circuit ...