3-34 ENGINE
VALVE STEM AND VALVE FACE WEAR CONDITION
Visually inspect each valve stem and valve face for wear and pit-
ting. If it is worn or damaged, replace the valve with a new one.
VALVE STEM DEFLECTION
Lift the valve about 10 mm (0.39 in) from the valve seat.
Measure the valve stem deflection in two directions, perpendicu-
lar to each other, by positioning the dial gauge as shown.
If the deflection measured exceeds the limit, then determine
whether the valve or the guide should be replaced with a new
one.
&
Valve stem deflection (IN & EX):
Service Limit: 0.35 mm (0.014 in)
%
09900-20607: Dial gauge (1/100 mm)
09900-20701: Magnetic stand
VALVE STEM WEAR
If the valve stem is worn down to the limit, as measured with a
micrometer, replace the valve.
If the stem is within the limit, then replace the guide.
After replacing valve or guide, be sure to recheck the deflection.
&
Valve stem O.D.:
Standard (IN) : 4.975 – 4.990 mm (0.1958 – 0.1964 in)
(EX): 4.955 – 4.970 mm (0.1950 – 0.1956 in)
%
09900-20205: Micrometer (0 – 25 mm)
NOTE:
If valve guides have to be removed for replacement after
inspecting related parts, carry out the steps shown in valve
guide servicing. (
$
3-35)
X
Y
Summary of Contents for LT-A450X
Page 2: ...SUPPLEMENTS LT A450XK9 09 MODEL LT A450XK8 12 13 WIRING DIAGRAM 14 ...
Page 47: ...PERIODIC MAINTENANCE 2 29 ...
Page 48: ...2 30 PERIODIC MAINTENANCE ...
Page 63: ...ENGINE 3 7 Remove the engine mounting nuts Remove the engine from the right side ...
Page 215: ......
Page 315: ...7 24 COOLING AND LUBRICATION SYSTEM ENGINE LUBRICATION SYSTEM To cylinder head OIL PUMP ...
Page 316: ...COOLING AND LUBRICATION SYSTEM 7 25 EXHAUST SIDE INTAKE SIDE ...
Page 317: ......
Page 332: ...8 14 CHASSIS REAR CARRIER Remove the rear carrier REAR BOX Remove the rear box 1 ...
Page 417: ......
Page 452: ...9 34 ELECTRICAL SYSTEM HEADLIGHT INSTALLATION Head light coupler Head light R Adjusting point ...
Page 484: ...10 26 SERVICING INFORMATION Rear box Rear fender Right mud guard Left mud guard ...
Page 510: ......
Page 514: ......